is 2 87663241 - 1
has 26389266 decimal digits
takes 295.539 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276174.577164.4737%705000128662506.68523.4327%181.262365.6932%1.2195%
PrimeNet2715.453661.9718%360000170000006.19165.4012%11.645264.0258%2.0540%
GPU7227587.287564.0000%600000200000008.09994.0441%95.387465.4559%1.4559%
Difference+1+87.2896+0.4737%+105000-7133750-1.4146-0.6115%+85.8749+0.2373%+0.2373%

Known prime factors (1 factor, 101.5 bits, 0.00011583% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
87663241368463967397530443387589120044131101.53921015876392108891079420
22 × 3 × 5 × 3697 × 23773 × 448999 × 8876003
2018-05-1344899988760031.541e+94.43934.4670

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2018-05-13T23:30:47Jwb52zClay7050001286625031101.5396.685591.113.373.433%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-11-19T15:40:00Architects Cubedm1_50264265--0.043--
2013-03-12T11:45:00evatutinvtdc265266--0.085--
2013-03-12T21:57:00gdbutchManual testing266267--0.170--
2013-03-13T02:30:00gdbutchManual testing267268--0.341--
2013-03-15T04:30:00Smok_bmvManual testing268269--0.682--
2013-03-18T09:13:00g0bManual testing269270--1.364--
2013-11-18T00:48:00S04803Manual testing270271--2.728--
2017-06-18T22:26:02Sid & AndyManual testing271272--5.456--
2017-06-18T22:26:02Sid & AndyManual testing272273--10.91--
2017-06-24T09:00:05Tim SorberaManual testing273274--21.82--
2018-04-26T08:16:08Brian BeuningManual testing274275--43.64--
2018-05-01T17:40:05Jon PaceManual testing275276--87.29--


ECM factoring results:
No ECM results for M87663241


Lucas-Lehmer results:
No L-L results for M87663241


PRP results:
No PRP results for M87663241


P-1 factor-bounds graph:
B1 = 705000, B2 = 12866250 (P-1 stage 2)
B1 = 705000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-05-13T23:30:47+00:00