is 2 55926791 - 1
has 16835642 decimal digits
takes 118.534 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
Actual2718.548363.3803 %----8.548363.3803 %
Target27334.202664.3836 %3600006000000011.09223.9384 %45.294965.7863 %
Difference-2-25.6544-1.0033 %-360000-60000000-11.0922-3.9384 %-36.7466-2.4060 %

Known prime factors (1 factor, 72.0 bits, 0.00012869% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5592679146236023257011761975292271.97041336202587604
22 × 3 × 179 × 19244042173
2012-06-191791924404217311.2583,222.16,018.1

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-06-19Jerry HallettManual testing2271.9702.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.15000e-5
2000-03-01ANONYMOUSv4_computers212544.29000e-5
2000-06-11ANONYMOUSv4_computers212560.000
2001-09-22ANONYMOUSv4_computers212570.000
2002-08-24ANONYMOUSv4_computers212580.001
2022-06-14LordJuliusManual testing21263
2009-01-051997rj7compa2632640.035
2009-01-07ANONYMOUS2642650.067
2010-01-23DanielH2652660.134
2010-02-01rickReserv42662670.267
2010-02-09rickReserv42672680.534
2011-04-17Pool Partydesk_52682691.069
2011-07-16kdgehmanManual testing2692716.414


ECM factoring results:
No ECM results for M55926791


Lucas-Lehmer results:
No L-L results for M55926791


PRP results:
No PRP results for M55926791


CERT results:
No CERT results for M55926791


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
271
269
268
267
266
265
264
263
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