is 2 97865177 - 1
has 29460354 decimal digits
takes 373.247 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual278625.518865.3846 %715000134062507.77792.8866 %633.296766.3838 %
Target276156.378364.4737 %60000010000000033.26703.7209 %189.645465.7956 %
Difference+2+469.1405+0.9109 %+115000-86593750-25.4891-0.8343 %+443.6513+0.5883 %

Known prime factors (1 factor, 88.2 bits, 0.00009008% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
978651773439532427684046867819544232788.1521757281053956529843
32 × 7 × 727 × 554003 × 69255481
2020-04-2055400369255481882,18923.76338.973

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-04-20HardyP Germanyws-Xeon1630_3.7GHz71500013406250622788.1527.7783.516%


Trial Factoring results:
57585960616263646566676869707172737475767778
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-18Architects Cubeda3_bu22642650.038
2014-02-09sasakiManual testing2652670.229
2014-05-23ANONYMOUSManual testing2672680.305
2014-05-23Smok_bmvManual testing2672680.305
2014-05-27Smok_bmvManual testing2682690.611
2014-06-03Per Jessenbeaufort42692701.222
2014-06-08PhilManual testing2702727.330
2019-03-13Niels_Mache_NextcloudManual testing2722739.77
2019-10-29Hans LoeblichManual testing27327419.55
2020-01-22TheJudgerManual testing274276117.3
2020-02-02TheJudgerManual testing276277156.4
2020-04-05SRBaseManual testing277278312.8


ECM factoring results:
No ECM results for M97865177


Lucas-Lehmer results:
No L-L results for M97865177


PRP results:
No PRP results for M97865177


CERT results:
No CERT results for M97865177


P-1 factor-bounds graph:
B1 = 715000, B2 = 13406250 (P-1 stage 2)
B1 = 715000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
278
277
276
274
273
272
270
269
268
267
265
this exponent TF target: 76
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00