is 2 58164287 - 1
has 17509196 decimal digits
takes 123.276 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
Actual2718.219463.3803 %----8.219463.3803 %
Target27332.886964.3836 %4000006500000012.04574.0788 %44.932665.8363 %
Difference-2-24.6675-1.0033 %-400000-65000000-12.0457-4.0788 %-36.7131-2.4560 %

Known prime factors (1 factor, 77.8 bits, 0.00013371% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
581642872577583513903920766771512477.7702215778484402225
33 × 52 × 148639 × 22084613
2012-02-0314863922084613838.904.12976.9064

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-02-03WRwr192477.7704.2410.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.06000e-5
2000-02-09ANONYMOUSv4_computers212544.13000e-5
2000-06-26ANONYMOUSv4_computers212560.000
2001-07-17ANONYMOUSv4_computers212570.000
2002-06-02ANONYMOUSv4_computers212580.001
2003-07-30ANONYMOUSv4_computers212590.001
2003-11-28ANONYMOUSv4_computers212610.003
2022-06-27LordJuliusManual testing261263
2009-01-12QuesterHome_Corei7-940_3.552632650.098
2009-01-13Sturle Sundegaudi.ifi2652660.128
2009-01-14Ken Hiattkenhia22662670.257
2009-05-30S00030vd132672680.514
2011-05-05sunithayaboxx2682691.028
2011-06-26shaugeManual testing2692716.167


ECM factoring results:
No ECM results for M58164287


Lucas-Lehmer results:
No L-L results for M58164287


PRP results:
No PRP results for M58164287


CERT results:
No CERT results for M58164287


P-1 factor-bounds graph:
104
105
106
104
105
106
107
108
TF factor-bounds graph:
271
269
268
267
266
265
263
261
259
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00