is 2 91216309 - 1
has 27458846 decimal digits
takes 330.406 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
Actual277335.555864.9351%6950006950003.65031.2894%339.206165.3872%0.4521%
PrimeNet2715.241161.9718%400000180000007.13725.5531%12.378464.0836%2.1117%
GPU7227583.887564.0000%600000220000009.27514.1368%93.162665.4893%1.4893%
Difference+2+251.6683+0.9351%+95000-21305000-5.6248-2.8474%+246.0436-0.1021%-0.1021%

Known prime factors (1 factor, 79.1 bits, 0.00008671% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
912163096465325309286679322453692479.0973543952490604876
22 × 3 × 7 × 83 × 1613 × 2333 × 135077
2019-04-1723331350772,294.00.05020.0722

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-04-17T14:19:57Jwb52zClay6950006950002479.0973.650660.87.3011.289%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-27T12:20:00Architects Cubedm1_06264265--0.041--
2012-04-05T00:59:00c10ck3rManual testing265266--0.082--
2014-01-31T23:08:00GrunwalderGIMPcompute-0-0266267--0.164--
2014-02-02T14:58:00Preben SManual testing267268--0.328--
2014-04-15T05:21:00ANONYMOUS268269--0.655--
2014-04-20T10:56:00TeamResslerTUB1062315269270--1.311--
2014-11-20T00:12:00shaugeManual testing270271--2.622--
2017-03-01T06:39:30monstManual testing271272--5.243--
2018-02-13T20:09:27gcardonaManual testing272273--10.49--
2018-02-13T20:09:27gcardonaManual testing273274--20.97--
2018-12-16T22:35:03TheJudgerManual testing274275--41.94--
2018-12-16T22:35:03TheJudgerManual testing275276--83.89--
2019-03-03T17:40:45TheJudgerManual testing276277--167.8--


ECM factoring results:
No ECM results for M91216309


Lucas-Lehmer results:
No L-L results for M91216309


PRP results:
No PRP results for M91216309


P-1 factor-bounds graph:
B1 = 695000 (P-1 stage 1)
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106
TF factor-bounds graph:
277
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2100
Last modified: 2019-04-17T14:19:57+00:00