is 2 51806957 - 1
has 15595449 decimal digits
takes 99.249 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
Actual2681.150561.7647 %----1.150561.7647 %
Target27336.922564.3836 %340000550000009.21693.8034 %46.139465.7382 %
Difference-5-35.7720-2.6189 %-340000-55000000-9.2169-3.8034 %-44.9889-3.9735 %

Known prime factors (1 factor, 73.8 bits, 0.00014246% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
51806957164767296953693671913932373.803159020435183728
24 × 1259 × 13337 × 591901
2010-07-291333759190156.3290.12460.1673

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2010-07-29ChuckEtienneMain2373.8031.8590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-01-04ANONYMOUSv4_computers212532.32000e-5
2000-02-23ANONYMOUSv4_computers212544.63000e-5
2000-04-27ANONYMOUSv4_computers212560.000
2001-05-27ANONYMOUSv4_computers212570.000
2002-03-16ANONYMOUSv4_computers212580.001
2003-11-28apocalypsev4_computers212600.001
2022-04-05LordJuliusManual testing260263
2008-12-02NiklotSophia2632640.038
2009-04-07Anonymous4502642650.072
2009-04-08ANONYMOUSnode12652660.144
2009-04-09ANONYMOUSnode12662670.288
2009-08-16XyzzyXyzzy-9550-rt2672680.577


ECM factoring results:
No ECM results for M51806957


Lucas-Lehmer results:
No L-L results for M51806957


PRP results:
No PRP results for M51806957


CERT results:
No CERT results for M51806957


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
268
267
266
265
264
263
260
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