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Old 2004-10-14, 13:06   #1
xilman
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Smile The factorization of 6,257+.c151

This appeared on my screen a few minutes ago:

Factorization completed after 1527.06 seconds, at Thu Oct 14 13:28:55 2004
Original number had 151 digits:
1016746319154708049868832708914850363204235107564950763844585902589989996732341456077505174388329296753484032231275656371607775670919442653294714106389
Probable prime factor 1 has 72 digits:
100013092725890544669630696532241946180071054595333636462851779928224547
Probable prime factor 2 has 80 digits:
10166132167728689294525570992142853580313167124429482332367659996796061108016487

Full details of the factorization will be announced in due course. I should say at this point though that Francesco Bosia is not only a member of the sieving team, he also performed the linear algebra on the matrix for us. Now that we no longer have access to the MSR cluster we must use other resources, such as Richard Wackerbarth's Mac and my
Athlon box. On this occasion Francesco provided, and I'm very grateful to him. Thanks Francesco!

This factorization completes the "old" list of Most Wanted Cunningham numbers. Sam Wagstaff has since produced a new list.

Paul

Last fiddled with by xilman on 2004-10-14 at 13:06
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Old 2004-10-14, 13:29   #2
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"Luigi"
Aug 2002
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Quote:
Originally Posted by xilman
This appeared on my screen a few minutes ago:

Factorization completed after 1527.06 seconds, at Thu Oct 14 13:28:55 2004
Original number had 151 digits:
1016746319154708049868832708914850363204235107564950763844585902589989996732341456077505174388329296753484032231275656371607775670919442653294714106389
Probable prime factor 1 has 72 digits:
100013092725890544669630696532241946180071054595333636462851779928224547
Probable prime factor 2 has 80 digits:
10166132167728689294525570992142853580313167124429482332367659996796061108016487

Paul



Congratulations to you all!

Luigi
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