30 lines
506 B
Python
30 lines
506 B
Python
#!/usr/bin/python3
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from math import sqrt
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from timeit import default_timer
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from projecteuler import is_pentagonal
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def main():
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start = default_timer()
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found = 0
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i = 143
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while not found:
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i = i + 1
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n = i * (2 * i - 1)
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if is_pentagonal(n):
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found = 1
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end = default_timer()
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print('Project Euler, Problem 45')
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print('Answer: {}'.format(n))
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print('Elapsed time: {:.9f} seconds'.format(end - start))
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if __name__ == '__main__':
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main()
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