is 2 91556807 - 1
has 27561346 decimal digits
takes 331.639 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
Actual277334.307964.9351%7000007000003.67661.2943%337.984565.3889%0.4539%
PrimeNet2715.221761.9718%400000180000007.13725.5555%12.358964.0845%2.1127%
GPU7227583.575564.0000%600000220000009.27514.1387%92.850665.4899%1.4899%
Difference+2+250.7324+0.9351%+100000-21300000-5.5985-2.8444%+245.1339-0.1010%-0.1010%

Known prime factors (1 factor, 77.2 bits, 0.00008435% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
915568071774240288979617757719132477.232968928661404508
22 × 7 × 6037 × 48487 × 118219		2019-05-2448487118219609.860.27460.5183

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-05-25T02:14:24Jwb52zClay7000007000002477.2323.677663.37.3531.294%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-26T22:20:00Architects Cubedm1_63264265--0.041--
2013-06-17T11:17:00David CampeauManual testing265266--0.082--
2014-06-03T01:11:00SMoffatManual testing266267--0.163--
2014-06-08T10:33:00Alex HenrieManual testing267268--0.326--
2014-06-11T07:51:00Alex HenrieManual testing268269--0.653--
2014-06-19T21:08:00ANONYMOUS269270--1.306--
2015-03-01T20:56:00monstManual testing270271--2.612--
2017-03-28T22:05:48monstManual testing271272--5.224--
2018-06-07T09:00:13Andrew LuebkeManual testing272273--10.45--
2018-06-20T09:00:04Tim SorberaManual testing273274--20.89--
2019-01-02T16:04:53Strolling JellyfishManual testing274275--41.79--
2019-01-02T16:04:53Strolling JellyfishManual testing275276--83.58--
2019-03-22T05:40:06Jon PaceManual testing276277--167.2--


ECM factoring results:
No ECM results for M91556807


Lucas-Lehmer results:
No L-L results for M91556807


PRP results:
No PRP results for M91556807


P-1 factor-bounds graph:
B1 = 700000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
277
276
275
274
273
272
271
270
269
268
267
266
265
250
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270
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2100
Last modified: 2019-05-25T02:14:24+00:00