Project Euler #216: Investigating the primality of numbers of the form 2n² - 1

Hacker
Rank
Score
41
flag of Belgium
05.56
43
flag of India
05.56
44
flag of Ireland
05.56
46
flag of United States
05.56
48
flag of Canada
05.56
51
flag of United States
05.56
52
flag of Turkey
05.56
53
flag of China
05.56
56
flag of Kenya
05.56
57
flag of Germany
05.56
60
flag of India
05.56
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