is 2 77961971 - 1
has 23468892 decimal digits
takes 243.279 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2791,570.422065.8228%10250002280625010.00732.9838%1,580.429366.8426%4.8707%
PrimeNet2716.132261.9718%320000160000005.31335.1893%11.445563.9452%1.9734%
GPU7227598.149264.0000%500000170000006.32993.7706%104.479165.3574%1.3574%
Difference+4+1,472.2727+1.8228%+525000+5806250+3.6774-0.7868%+1,475.9501+1.4851%+1.4851%

Known prime factors (1 factor, 78.8 bits, 0.00010110% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
779619715335792693739888957037772478.8203422048355947728
24 × 13 × 109 × 150937206949		2016-02-171091509372069491,565.037,20969,496

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-02-04T03:17:49Jerry HallettP1Main10250002280625012---10.01--2.984%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-17T00:00:00ANONYMOUSv4_computers?253--1.53911e-5--
2010-10-16T21:41:00ANONYMOUSHome264265--0.048--
2010-10-17T16:22:00ANONYMOUS265266--0.096--
2010-12-18T09:51:00GrunwalderGIMPcompute-0-1266267--0.192--
2010-12-22T07:34:00Gymnasium_RaublingLZ4267268--0.383--
2011-01-18T18:21:00SAHS Tech Deptcad4268269--0.767--
2011-01-22T09:45:00Gymnasium_RaublingLZ1269270--1.534--
2013-01-14T23:37:00phoenicisManual testing270271--3.067--
2016-01-26T03:54:38apocalypseManual testing271272--6.134--
2016-01-26T03:54:38apocalypseManual testing272273--12.27--
2016-01-26T03:54:38apocalypseManual testing273274--24.54--
2016-01-26T03:54:38apocalypseManual testing274275--49.08--
2016-02-11T00:11:07Chris SmithManual testing275276--98.15--
2016-02-11T00:11:07Chris SmithManual testing276277--196.3--
2016-02-17T08:10:48Chris SmithManual testing277278--392.6--
2016-02-17T08:10:48Chris SmithManual testing27827978.82024779.8495.01,587


ECM factoring results:
Exponent "77961971" not found


Lucas-Lehmer results:
Exponent "77961971" not found


PRP results:
Exponent "77961971" not found


P-1 factor-bounds graph:
B1 = 1025000, B2 = 22806250 (P-1 stage 2)
B1 = 1025000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2016-02-17T08:10:48+00:00