Problem 55275. List the semiprimes

Created by ChrisR

Solve Later

{"parts":[{"partUri":"/matlab/document.xml","contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?><w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>A semiprime number—or a 2-almost prime—is the product of two prime numbers. The numbers </w:t></w:r><w:customXml w:element=\"equation\"><w:customXmlPr><w:attr w:name=\"displayStyle\" w:val=\"false\"/><w:attr w:name=\"altTextString\" w:val=\"6 = 2x3\"/></w:customXmlPr><w:r><w:t>6 = 2\\times 3</w:t></w:r></w:customXml><w:r><w:t> and </w:t></w:r><w:customXml w:element=\"equation\"><w:customXmlPr><w:attr w:name=\"displayStyle\" w:val=\"false\"/><w:attr w:name=\"altTextString\" w:val=\"9 = 3x3\"/></w:customXmlPr><w:r><w:t>9 = 3 \\times 3</w:t></w:r></w:customXml><w:r><w:t> are semiprimes, but </w:t></w:r><w:customXml w:element=\"equation\"><w:customXmlPr><w:attr w:name=\"displayStyle\" w:val=\"false\"/><w:attr w:name=\"altTextString\" w:val=\"8 = 2x2x2\"/></w:customXmlPr><w:r><w:t>8 = 2\\times2 \\times 2</w:t></w:r></w:customXml><w:r><w:t> and </w:t></w:r><w:customXml w:element=\"equation\"><w:customXmlPr><w:attr w:name=\"displayStyle\" w:val=\"false\"/><w:attr w:name=\"altTextString\" w:val=\"30 = 2x3x5\"/></w:customXmlPr><w:r><w:t>30 = 2\\times 3 \\times 5</w:t></w:r></w:customXml><w:r><w:t> are not. The semiprimes appear in three of Ramon Villamangca’s “Easy Sequences”: Cody Problems </w:t></w:r><w:hyperlink w:docLocation=\"https://www.mathworks.com/matlabcentral/cody/problems/52859\"><w:r><w:rPr><w:u/></w:rPr><w:t>52859</w:t></w:r></w:hyperlink><w:r><w:t>, </w:t></w:r><w:hyperlink w:docLocation=\"https://www.mathworks.com/matlabcentral/cody/problems/52990\"><w:r><w:rPr><w:u/></w:rPr><w:t>52990</w:t></w:r></w:hyperlink><w:r><w:t>, and </w:t></w:r><w:hyperlink w:docLocation=\"https://www.mathworks.com/matlabcentral/cody/problems/53740\"><w:r><w:rPr><w:u/></w:rPr><w:t>53740</w:t></w:r></w:hyperlink><w:r><w:t>. </w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>Write a function to list the semiprime numbers less than or equal to the input number. </w:t></w:r></w:p></w:body></w:document>","relationship":null}],"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","target":"/matlab/document.xml","relationshipId":"rId1"}]}

<div style = "text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; "><div style="block-size: 93px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 46.5px; transform-origin: 407px 46.5px; vertical-align: baseline; "><div style="block-size: 63px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 31.5px; text-align: left; transform-origin: 384px 31.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 297.167px 8px; transform-origin: 297.167px 8px; unicode-bidi: normal; ">A semiprime number—or a 2-almost prime—is the product of two prime numbers. The numbers <img src="data:image/png;base64,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" alt="6 = 2x3" style="width: 60.5px; height: 18px;" width="60.5" height="18"><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 15.5583px 8px; transform-origin: 15.5583px 8px; unicode-bidi: normal; "> and <img src="data:image/png;base64,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" alt="9 = 3x3" style="width: 60.5px; height: 18px;" width="60.5" height="18"><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 1.94167px 8px; transform-origin: 1.94167px 8px; unicode-bidi: normal; "> are semiprimes, but <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKgAAAAkCAYAAAAdOXEXAAAFeUlEQVR4Xu1aN8sWTRR93x9g9geIobBSMDVaKBhQsBJUtLAQTGAlKoqdfsHCwsIAloKKtopaKKgIRrSyMJRWhp+g58BeGJYJ984G58FZuDxhd3bunDlz08z0VL0qAgUjMF2wblW1isBUJWglQdEIVIIWPT1VuUrQyoGiEagELXp6qnJagi4DVDMauD7g8/uEQ+eO59mEjWUe9F3a6PwVn18mTH8T9jGCLsTAj0F2Qf5rQFjQ/H6Jz8MTCM5x6HwSMqc1qf/g94XCFx4n9n/I5pbun/F7H6T0hZaFfYigBOMxhETc05o4uUecVk4QSV81+oYMzgPPWEsxTluhyN2EMttw/14pCrf0yMY+RNBP6GARJDToA7h3BXIZQkta+sXVS+tzEHKnWXD0EDsgrkWlJT1d2GDo0j9CaCzOQsRSkrRHIa5Fnd+MraQhdMLeR1BayHfNCJfj871ntGvx31PIT8jcktDw6MIJ/gbZDbkZGQtvlTiec9BrE2RLgHz3HZJyAV4taD46Y+8jqJCP4wxZUHmG8c/iggDxqUJrvx7CWDp0uS4otCjbbQk+yfEQYrG6EiLtRTuNS/7R6O8zFNTJdf+3EuN0x0A8LkGsYRrb0Pu0Q79BsPcRVFjPDl9DfCuXq/oUpESX2AaKLuY5JJZEiBtiWy1BOcE3ms60OAg5maRpYl5JVFNh1K9GDy1BZXGRnPQaWpKSnIeavjQxb2fsQzGoq0gbSAGZK5uuZ9LKHL6VLgTlZC2BaMtoFpJayenTM/SfEPQEHjivbGglqZWcSjWmotiHCOoqz444cdshMyHXIYzlzhgmUpR1a3jaAfie67v+J+BrLZCrk4akQ5KTVpahFi+t9Xfng2FKypIORU7qEcU+Vgdtk1SIqo2dfMRy49suBO07GZCqxToolVNPjJF0SHISQ+mbno7hmPVKWdIhyUldo9indpJCJGXSEQraYwBJsdkKYvv5i/hDk2Bo+pFFk2M9U5Z0aHKyf8nirdbT1T1E0qHJmcQ+RVCJD5gEMDh2d2A0QbKGIH/6GU4wKxF9xNOuJWWNmL+1CVEODjLBltgz1E+bpAzjLAlRjv5J7GMEldUjRGSsw//cwnCuS8wZzBBtWIL6F5LrEXw6uSTlfU22njM2EuoFhGWuVJavfb/PYw5liFTYhwgqltPn9lyzPwl10NDkyIZE3xPgbnSwb20JSksieY4WbjZEU4+0vJvv3dk0sJSgLH2osQ8RlCUkuqbQ5LmDsFjRUrJ4a7FcC74bc3Lxcrt4CJJaiuVa3flc2/hQ/75JasI+tZMUCrxdK2HJqEvI4k0AGWbXlxBtRHtrMT/V5RjkpGFi+KApQaX0de+bsc8lKDuV4rCFoH86i2cczd2xWKlMrLyl3BTL1jV1Uu0kcwdvRcKt0whYz+yGsvVUCUqrN5/Lwj7l4kMHLNztULqBSdhNErBvQ9/Ybgsn6wnEd7DENyGaUlIfJOU7eJopVm2gLtcgqwzMSZWS+iBpNvapJCm0Fy/H7brWDg04dnpUAOJiksPXvhduwJ+rIdrtTg05pZ8uJJW2xPttAIlZ+J9lIY5Pu92ZIqd01YWknbCPlZnkQAhJuh8ihXkpD7C8cQSi3bfuxLAOjX2lk9jrtFm3hZxdSNouW8V0tyQ0WnJ2IWln7FOFejnUS8si1yN8SZ0O6sCn3puyZObqn+qARW/NLpm7xWgp9VjaSe05pbPcf4MvmqN/LnEsZTZru87YpwiqBeZvfY5nMZntWr1Ibrs+cSbZ1kCsW8a57bJ0rwTNgq02GguBStCxkK79ZCFQCZoFW200FgKVoGMhXfvJQqASNAu22mgsBCpBx0K69pOFQCVoFmy10VgIVIKOhXTtJwuB38VvnzR/zZ/+AAAAAElFTkSuQmCC" alt="8 = 2x2x2" style="width: 84px; height: 18px;" width="84" height="18"><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 15.5583px 8px; transform-origin: 15.5583px 8px; unicode-bidi: normal; "> and <img src="data:image/png;base64,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" alt="30 = 2x3x5" style="width: 91.5px; height: 18px;" width="91.5" height="18"><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 205.517px 8px; transform-origin: 205.517px 8px; unicode-bidi: normal; "> are not. The semiprimes appear in three of Ramon Villamangca’s “Easy Sequences”: Cody Problems <a target='_blank' href = "https://www.mathworks.com/matlabcentral/cody/problems/52859">52859</a><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 3.88333px 8px; transform-origin: 3.88333px 8px; unicode-bidi: normal; ">, <a target='_blank' href = "https://www.mathworks.com/matlabcentral/cody/problems/52990">52990</a><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 17.5px 8px; transform-origin: 17.5px 8px; unicode-bidi: normal; ">, and <a target='_blank' href = "https://www.mathworks.com/matlabcentral/cody/problems/53740">53740</a><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 3.88333px 8px; transform-origin: 3.88333px 8px; unicode-bidi: normal; ">. </div><div style="block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 264.75px 8px; transform-origin: 264.75px 8px; unicode-bidi: normal; ">Write a function to list the semiprime numbers less than or equal to the input number. </div></div></div>

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Last Solution submitted on Sep 12, 2022

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Solution 8856250

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ChrisR on 2 Aug 2022

I used a similar approach, and it worked on my laptop up to about n = 1.3e6. I had to pull back on the test cases to n = 800,000, probably because of memory in Cody.

Tim on 4 Aug 2022

Having started programming on an IBM 1130, I feel guilty creating such large arrays.

ChrisR on 5 Aug 2022

If I wrote a program to solve this problem on my first computer (a TRS-80), it would probably still be running.

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Problem 55275. List the semiprimes

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Problem 55275. List the semiprimes

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