is 2 52566557 - 1
has 15824111 decimal digits
takes 100.704 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
Actual2692.271262.3188 %----2.271262.3188 %
Target27336.389064.3836 %3600006000000010.02613.9075 %46.415165.7753 %
Difference-4-34.1178-2.0647 %-360000-60000000-10.0261-3.9075 %-44.1440-3.4564 %

Known prime factors (1 factor, 93.8 bits, 0.00017851% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
52566557176963692651826969453636303772993.837168323457680352709284
22 × 3 × 112 × 47 × 33409 × 176089 × 419261
2011-05-0217608941926156,695,0970.52590.9955

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-05-02curtiscmar124c-02s2993.8372.6280.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-01ANONYMOUSv4_computers212532.28000e-5
2000-02-23ANONYMOUSv4_computers212544.57000e-5
2000-05-10ANONYMOUSv4_computers212560.000
2001-06-30ANONYMOUSv4_computers212570.000
2002-05-11ANONYMOUSv4_computers212580.001
2003-12-021997rj7v4_computers212590.001
2004-03-081997rj7v4_computers212600.001
2007-11-17ANONYMOUSv4_computers212630.019
2008-11-19DerekManual testing212640.036
2008-12-11Sturle Sundemechelen.ifi2642650.071
2008-12-13korvadualcore12652660.142
2008-12-15korvadualcore12662670.284
2009-04-25Chris Vernieri117C_WORKSTATION2672680.569
2010-04-07Doug_Dedenrowdy2682691.137


ECM factoring results:
No ECM results for M52566557


Lucas-Lehmer results:
No L-L results for M52566557


PRP results:
No PRP results for M52566557


CERT results:
No CERT results for M52566557


P-1 factor-bounds graph:
104
105
106
104
105
106
TF factor-bounds graph:
269
268
267
266
265
264
263
260
259
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00