From 70372.1170@compuserve.comWed Oct 11 21:47:25 1995
Date: Wed, 11 Oct 1995 07:51:05 EDT
From: Harvey Dubner <70372.1170@compuserve.com>
To: Multiple recipients of list NMBRTHRY <NMBRTHRY@felix.unife.it>
Subject: Record Sophie Germain

I would like to announce that I have regained the record for the largest
Sophie Germain prime.  Having lost the record about 8 months ago I suspect
that this latest record will not last very long since prime searching can
be done with many computers in parallel and the numbers of computers keep
increasing and getting faster.

The following Sophie Germain prime was found on Oct 3, 1995:

P = 2687145 * 3003 * 10^5072 - 1 ,     prime with 5082 digits

Q = 2 * P + 1  ,             companion prime with 5083 digits

The previous record was 4932 digits.

It took an average of 6 PC's (4 PC 486/33's and 2 PC 486/66's) about 40 days
to find the two related primes.  This was somewhat longer than the expected
time.  All the computers were equipped with Cruncher cards which increased
the speed of these computers by 50-100 times.

If anyone wants any technical or sales information about the Dubner Cruncher
just ask.  Talking about Crunchers is my favorite subject.

I would like to send my congratulations in advance to the next Sophie
Germain record breaker.

Harvey Dubner