is 2 58145281 - 1
has 17503474 decimal digits
takes 123.236 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
Actual27332.897764.3836 %----32.897764.3836 %
Target27332.897764.3836 %4000006500000012.04574.0786 %44.943365.8362 %
Difference----400000-65000000-12.0457-4.0786 %-12.0457-1.4527 %

Known prime factors (1 factor, 64.8 bits, 0.00011143% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58145281318842478121053332632064.789274177433351
19 × 14951 × 965179
2012-10-12149519651790.06120.20500.3018

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-10-12S01103In-Laws2064.7893.3770.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.06000e-5
1999-12-23ANONYMOUSv4_computers212532.06000e-5
2000-02-09ANONYMOUSv4_computers212544.13000e-5
2000-06-26ANONYMOUSv4_computers212560.000
2000-06-28ANONYMOUSv4_computers212560.000
2000-06-29ANONYMOUSv4_computers212560.000
2001-07-17ANONYMOUSv4_computers212570.000
2002-06-09ANONYMOUSv4_computers212580.001
2003-07-30ANONYMOUSv4_computers212590.001
2003-11-16ANONYMOUSv4_computers212610.003
2022-06-27LordJuliusManual testing261263
2008-10-27Fanchar LandagWorkstation2632640.032
2008-10-27KYOJI_KAMEIwlaptop2642650.064
2008-10-27KYOJI_KAMEIwlaptop2652660.129
2008-10-27KYOJI_KAMEIwlaptop2662670.257
2009-07-29PrimewiseEVGA_x58_sli_se2672680.514
2011-08-26Carsten KossendeyManual testing2682691.028
2011-09-29dmaineManual testing2692702.056
2011-11-09ANONYMOUS2702714.113
2012-06-04Kyle AskineManual testing2712728.225
2012-09-11bcp19Manual testing27227316.45


ECM factoring results:
No ECM results for M58145281


Lucas-Lehmer results:
No L-L results for M58145281


PRP results:
No PRP results for M58145281


CERT results:
No CERT results for M58145281


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
261
259
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