is 2 62103929 - 1
has 18695146 decimal digits
takes 145.887 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
Actual27330.800764.3836 %----30.800764.3836 %
Target27461.604264.8649 %4000006500000013.35073.7226 %74.955066.1728 %
Difference-1-30.8035-0.4813 %-400000-65000000-13.3507-3.7226 %-44.1543-1.7892 %

Known prime factors (1 factor, 86.5 bits, 0.00013920% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
621039291057576311791717434773618012786.451851456847272672100
22 × 3 × 52 × 11399 × 33469 × 7439297
2013-05-20334697439297445,6961.48842.5785

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-05-20TheJudgerManual testing2786.4512.9320.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-30Gordon Spencev4_computers212590.001
2022-03-29LordJuliusManual testing21263
2008-12-26DerekDerek_Desk2632640.032
2009-08-19Bryn Pugh-Jonesunicomp2642650.060
2009-08-28southafricaho2652660.120
2009-09-01Net_ForceKathy_PC2662670.241
2009-09-05Net_ForceKathy_PC2672680.481
2009-09-09Net_ForceKathy_PC2682690.963
2011-12-07benthomasMini2692701.925
2013-02-16XyzzyManual testing2702713.850
2013-02-21bcp19Manual testing2712727.701
2013-03-08Kevin JagetManual testing27227315.40


ECM factoring results:
No ECM results for M62103929


Lucas-Lehmer results:
No L-L results for M62103929


PRP results:
No PRP results for M62103929


CERT results:
No CERT results for M62103929


P-1 factor-bounds graph:
103
104
105
103
104
105
106
107
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00