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Old 2019-06-26, 11:20   #11
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Sep 2003

A1916 Posts

Originally Posted by mathwiz View Post
What program was used to find factors of W(W(61)) onward?
All Wagstaff factors are 2*k*p + 1 for some k, just like with Mersenne. And k is small enough for those factors that you could quickly find them even with a dumb Python script.
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