is 2 58278751 - 1
has 17543653 decimal digits
takes 123.519 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
Actual27332.822364.3836 %----32.822364.3836 %
Target27332.822364.3836 %4000006500000012.04574.0798 %44.868065.8366 %
Difference----400000-65000000-12.0457-4.0798 %-12.0457-1.4531 %

Known prime factors (1 factor, 110.2 bits, 0.00018904% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58278751146134669622708782365805879920694334110.17112537560184046221440624721
3 × 9887 × 17911 × 94513 × 203821 × 1225087
2012-10-2820382112250872.694e+90.79741.2748

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-10-28TheJudgerManual testing34110.1712.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-23ANONYMOUSv4_computers212532.06000e-5
2000-02-09ANONYMOUSv4_computers212544.12000e-5
2000-06-28ANONYMOUSv4_computers212560.000
2001-07-17ANONYMOUSv4_computers212570.000
2002-09-22ANONYMOUSv4_computers212580.001
2003-07-30ANONYMOUSv4_computers212590.001
2003-12-13ANONYMOUSv4_computers212610.003
2022-06-27LordJuliusManual testing261263
2008-10-29Sturle Sundeletov.ifi2632640.032
2008-10-29James HeinrichQ66002642650.064
2008-10-31NeedGem LiouAcerNB2652660.128
2008-11-01NeedGem LiouAcerNB2662670.256
2009-08-01Team_Elteor_Borislavj~ElteorHW42672680.513
2011-11-30rduerrManual testing2682691.026
2012-04-19krackerManual testing2692702.052
2012-04-20Jerry HallettManual testing27027212.31
2012-09-30Kyle AskineManual testing27227316.41


ECM factoring results:
No ECM results for M58278751


Lucas-Lehmer results:
No L-L results for M58278751


PRP results:
No PRP results for M58278751


CERT results:
No CERT results for M58278751


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
273
272
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
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290
2100
2110
2120
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Last modified: 2024-03-13T02:15:48+00:00