Factorizations of Cyclotomic Numbers Project News

News and project updates which haven't been added to distributedcomputing.info yet.

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Factorizations of Cyclotomic Numbers Project News

Postby Jwb52z » Sat Nov 05, 2005 2:06 pm

November 05, 2005

Announcement !
I will go to San Francisco from November 6 to 11 for business trip.
Next update will be November 13.
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Posts: 997
Joined: Tue Aug 30, 2005 10:56 pm

Postby Jwb52z » Fri Jul 07, 2006 2:30 am

July 02, 2006

Announcement !
I will go to London from July 02 to 95 for business trip.
Next update will be July 11.

News !

Phi(53) series have been completely factored.
Last composite number was factored
by Alexander Kruppa on July 01, 2006.
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Postby Jwb52z » Sun Jul 30, 2006 8:52 am

July 30, 2006

News !

New P-1 record was found by Mr. Takahiro Nohara in the factor of (119 960)
on June 30, 2006, and it was reported by Paul Zimmermann at ANTS7 conference at Berlin.
New record is 66 digits.

By Takahiro Nohara (June 30, 2006),

(119 960 (239 18306961 672038771836751227845696565342450315062141551559473564642434674541) (C 211))

Input number C277 = (960119-1)*(960-1)/(96017-1)/(9607-1)/239/18306961

GMP-ECM 6.0 [powered by GMP 4.1.4] [P-1]
Input number is 4534940450892283911208126393690258384988042016574819738319747642915879803395742080283982244070323431018279153104670486112987121537444451080769872116621250825134759049142033974084282461818274224891145902382256969755775241379229140871875464167541623571269624457889110626289059679 (277 digits)
Using B1=30000000, B2=30000000000, polynomial x60, x0=3595167554
Step 1 took 270553ms
Step 2 took 255414ms
********** Factor found in step 2: 672038771836751227845696565342450315062141551559473564642434674541
Found probable prime factor of 66 digits: 672038771836751227845696565342450315062141551559473564642434674541
Composite cofactor 6748033954198541641116187530191996128108876166596199520132055832252425905716028492203214753613345932751509767600490063067626155508527869161600324066876690608492614900894048999730298490979990607147060084877047419 has 211 digits
Report your potential champion to Paul Zimmermann
(see http://www.loria.fr/~zimmerma/records/Pminus1.html)

P66-1 = 22 * 3 * 5 * 7 * 17 * 23 * 31 * 163 * 401 * 617 * 4271 * 13681 * 22877 * 43397 * 203459 * 1396027 * 6995393 * 13456591 * 2110402817
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Postby Jwb52z » Mon Nov 20, 2006 3:46 pm

News !

Phi(81) series have been completely factored.
Last composite number was factored
by Greg Childers on November 16, 2006.
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Posts: 997
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Postby Jwb52z » Sun Feb 18, 2007 4:00 am

February 17, 2007

News !

Phi(162) series have been completely factored.
Last composite number was factored
by Tomoya Adachi on February 16, 2007.
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Posts: 997
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Postby Jwb52z » Tue Feb 27, 2007 10:06 pm

February 27, 2007

News !

Phi(106) series have been completely factored.
Last composite number was factored
by Greg Childers on February 26, 2007.
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Posts: 997
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