Problem 49738. Determine whether a prime is Pythagorean
Pythagorean primes get their name from the property that they can be written as the sum of two squares. For example, . Cody Problem 45964 asked you to find the nth Pythagorean prime and two numbers whose squares will produce the prime. This problem merely asks you to determine whether a prime can be written as the sum of two squares.
Write a function to determine whether a prime is Pythagorean. All input numbers in the tests are prime. Because some are large, they are given as strings.
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