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  1. def fact(n, memo={}):
  2.     if n == 0: return 1
  3.     if n not in memo:
  4.         memo[n] = n * fact(n-1, memo)
  5.     return memo[n]
  6.  
  7. def is_prime(n):
  8.     return fact(n-1) % n == n-1
  9.  
  10. print(sum(x for x in range(1,10001) if not is_prime(x)))
Success #stdin #stdout 1.17s 10928KB
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https://ideone.com/ShjbMd
language:
Python (cpython 2.7.16)
created:
12 years ago
visibility:
secret

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