is 2 90918851 - 1
has 27369302 decimal digits
takes 329.328 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
Actual277336.653764.9351%6850006850003.59781.2802%340.251465.3840%0.4489%
PrimeNet2715.258361.9718%400000180000007.13725.5509%12.395564.0827%2.1109%
GPU7227584.162064.0000%600000200000008.70284.0621%92.864765.4624%1.4624%
Difference+2+252.4917+0.9351%+85000-19315000-5.1050-2.7819%+247.3867-0.0784%-0.0784%

Known prime factors (1 factor, 81.9 bits, 0.00009009% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9091885145430286857825070045454072581.91024983975467213653
3 × 11 × 31 × 3571 × 34217 × 199873
2019-04-08342171998736,964.00.22710.3658

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-04-08T17:49:32Jwb52zClay6850006850002581.9103.598658.77.1961.280%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-05-15T08:56:00Carsten Kossendeyleela264265--0.041--
2010-09-28T18:12:00Carsten Kossendeymother265266--0.082--
2010-12-28T05:24:00Carsten KossendeyManual testing266267--0.164--
2011-08-16T19:12:00Carsten KossendeyManual testing267268--0.329--
2013-06-24T09:21:00Carsten KossendeyManual testing268269--0.658--
2014-04-01T23:37:00SMoffatManual testing269270--1.315--
2014-09-10T16:23:00PascalBieriManual testing270271--2.630--
2016-05-04T10:19:49Carsten KossendeyManual testing271272--5.260--
2017-08-28T07:36:34Carsten KossendeyManual testing272273--10.52--
2018-12-09T18:21:49TheJudgerManual testing273274--21.04--
2018-12-09T18:21:49TheJudgerManual testing274275--42.08--
2018-12-09T18:21:49TheJudgerManual testing275276--84.16--
2019-01-27T22:55:25TheJudgerManual testing276277--168.3--


ECM factoring results:
No ECM results for M90918851


Lucas-Lehmer results:
No L-L results for M90918851


PRP results:
No PRP results for M90918851


P-1 factor-bounds graph:
B1 = 685000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
277
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275
274
273
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271
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266
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2100
Last modified: 2019-04-08T17:49:32+00:00