Message 1134 from Yahoo.Groups.Primeform
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To: primeform@egroups.com
Subject: Re: [primeform] R86453 is PRP
Date: Thu, 26 Oct 2000 19:20:26 EDT
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From: "Chris Nash" <chris_nash@...>

Hi folks

>I used pfgw to show that the repunit R86453 = (10^86453-1)/9 is a
>probable prime.

Congratulations to Lew Baxter on this fantastic result! I must have had
a premonition, I recently added the repunit function R to pfgw
(although I am holding out a little since the N-1 test is also near
completion). In addition, I've now added variable bases to pfgw as
well.

>Would anyone wish to verify this?

crnash$ echo "R(86453)" >r86453.txt
crnash$ pfgw -b17 r86453.txt

is running right now, all 287187 iterations of it.... I can't promise a
result too quickly, since I'm also N-1 testing Phi(2521,402) *and*
looking for a new (and completely unrelated) record, all on one
processor :)

It's going to be difficult, if not impossible, to factor N-1 for this
one, 86453-1 really doesn't factor too well!

Chris


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