is 2 56796461 - 1
has 17097439 decimal digits
takes 120.377 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
Actual2692.102062.3188 %----2.102062.3188 %
Target27333.678964.3836 %4000006500000012.04574.0666 %45.724665.8319 %
Difference-4-31.5769-2.0647 %-400000-65000000-12.0457-4.0666 %-43.6226-3.5131 %

Known prime factors (1 factor, 69.8 bits, 0.00012295% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5679646110497620978060156170972269.8319241439337268
22 × 23 × 191 × 525918469
2011-06-181915259184693.919288.058164.47

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-18steinrarManual testing2269.8312.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-23ANONYMOUSv4_computers212532.11000e-5
2000-03-08ANONYMOUSv4_computers212544.23000e-5
2000-06-28ANONYMOUSv4_computers212560.000
2001-09-30ANONYMOUSv4_computers212570.000
2002-11-02ANONYMOUSv4_computers212580.001
2022-06-27LordJuliusManual testing21263
2008-08-10Sturle Sundekorsmo.ifi2632640.033
2008-08-13Sturle Sundefungo.ifi2642650.066
2008-08-14Sturle Sundedoak.ifi2652660.132
2008-08-16Sturle Sundeklengel.ifi2662670.263
2009-07-24Per Jessenbeaufort12672680.526
2011-04-19Ralf ReckerManual testing2682691.053


ECM factoring results:
No ECM results for M56796461


Lucas-Lehmer results:
No L-L results for M56796461


PRP results:
No PRP results for M56796461


CERT results:
No CERT results for M56796461


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
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