is 2 57287873 - 1
has 17245369 decimal digits
takes 121.418 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
Actual27333.390064.3836 %----33.390064.3836 %
Target27333.390064.3836 %4000006500000012.04574.0710 %45.435765.8335 %
Difference----400000-65000000-12.0457-4.0710 %-12.0457-1.4499 %

Known prime factors (1 factor, 75.2 bits, 0.00013134% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
57287873446770029323601248207292375.242389934209395068
22 × 3 × 133 × 17 × 79 × 11012959
2012-09-07219711012959254.651.85043.4440

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-09-07owftheevilManual testing2375.2422.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-23ANONYMOUSv4_computers212532.09000e-5
2000-03-08ANONYMOUSv4_computers212544.19000e-5
2000-06-28ANONYMOUSv4_computers212560.000
2001-09-22ANONYMOUSv4_computers212570.000
2002-11-02ANONYMOUSv4_computers212580.001
2003-08-25Team Prime Ribv4_computers212600.001
2022-06-27LordJuliusManual testing260263
2008-09-24arnaudGTI032632640.033
2008-09-25James HeinrichWHS2642650.065
2008-09-26Sturle Sundejodel.ifi2652660.130
2008-09-29Team_InspectorBarrister2662670.261
2009-07-30Frederick16112672680.522
2011-04-24Zet_koryellowpon_i3_12682691.044
2011-09-21Wolfgang Stegerff-beogate2692702.087
2012-04-28XyzzyManual testing2702714.174
2012-05-21Craig MeyersManual testing2712728.348
2012-08-16Jerry HallettManual testing27227316.70


ECM factoring results:
No ECM results for M57287873


Lucas-Lehmer results:
No L-L results for M57287873


PRP results:
No PRP results for M57287873


CERT results:
No CERT results for M57287873


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
107
108
TF factor-bounds graph:
273
272
271
270
269
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
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00