25 Oct
2015
25 Oct
'15
7:50 a.m.
1+2*5^0=3 is prime, 1+2*5^3=251 is prime, 1+2*5^251 is prime, ... ? ... (Maybe this progression was implicit in Henry's post, but I thought it deserved explicit mention.) Jim Propp On Sunday, October 25, 2015, Henry Baker <hbaker1@pipeline.com> wrote:
1+2*251^251 is prime. Lisp's integer-length returns 2002 bits.
251 = 1+2*5^3 and is prime.
Kinda cool!
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