is 2 56173301 - 1
has 16909849 decimal digits
takes 119.056 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
Actual2692.125362.3188 %----2.125362.3188 %
Target27334.052664.3836 %4000006500000012.04574.0610 %46.098265.8299 %
Difference-4-31.9272-2.0647 %-400000-65000000-12.0457-4.0610 %-43.9729-3.5111 %

Known prime factors (1 factor, 87.5 bits, 0.00015578% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
561733012196123091868157571357583772787.5051954774824313918788
22 × 32 × 19 × 1297 × 395023 × 5577997
2011-10-203950235577997868,1122.08182.4707

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-10-20TheJudgerSinope2787.5054.7360.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.14000e-5
2000-03-01ANONYMOUSv4_computers212544.27000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-09-22ANONYMOUSv4_computers212570.000
2002-09-14ANONYMOUSv4_computers212580.001
2004-10-031997rj7v4_computers212600.001
2022-06-27LordJuliusManual testing260263
2008-06-30James HeinrichQ66002632650.100
2008-07-02James HeinrichWHS2652660.133
2008-07-03James HeinrichWHS2662670.266
2009-11-17unconnectedsaudi-E54052672680.532
2011-04-13dsls52682691.064


ECM factoring results:
No ECM results for M56173301


Lucas-Lehmer results:
No L-L results for M56173301


PRP results:
No PRP results for M56173301


CERT results:
No CERT results for M56173301


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
269
268
267
266
265
263
260
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00