is 2 91738249 - 1
has 27615965 decimal digits
takes 332.296 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
Actual277333.646764.9351 %745000178800008.81623.3729 %342.462966.1178 %
Target27583.410264.0000 %60000011000000034.45684.1397 %117.867065.4903 %
Difference+2+250.2365+0.9351 %+145000-92120000-25.6406-0.7668 %+224.5959+0.6275 %

Known prime factors (1 factor, 78.9 bits, 0.00008600% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
917382495617187709603463413253672478.8943061529825800067
13147 × 79693 × 2922077
2019-06-11796932922077812.741.23191.5617

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-06-11penluManual testing745000178800001222478.8948.9334.089%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-06Architects Cubedm1_112642650.041
2013-06-21David CampeauManual testing2652660.081
2014-04-04Andreas_TruetschManual testing2662670.163
2014-04-04hkskypManual testing2672702.281
2014-09-11Judge HaleCJ2702712.607
2018-03-11Tim SorberaManual testing2712725.213
2018-07-01Andrew LuebkeManual testing27227310.43
2018-07-25gcardonaManual testing27327420.85
2019-01-13TheJudgerManual testing274276125.1
2019-05-01Kevin JagetManual testing276277166.8


ECM factoring results:
No ECM results for M91738249


Lucas-Lehmer results:
No L-L results for M91738249


PRP results:
No PRP results for M91738249


CERT results:
No CERT results for M91738249


P-1 factor-bounds graph:
B1 = 745000, B2 = 17880000 (P-1 stage 2)
B1 = 745000 (P-1 stage 1)
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108
TF factor-bounds graph:
277
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273
272
271
270
267
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265
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00