is 2 62285557 - 1
has 18749821 decimal digits
takes 146.313 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
Actual27330.710964.3836 %----30.710964.3836 %
Target27461.424664.8649 %4000006500000013.35073.7240 %74.775366.1733 %
Difference-1-30.7137-0.4813 %-400000-65000000-13.3507-3.7240 %-44.0645-1.7897 %

Known prime factors (1 factor, 95.4 bits, 0.00015311% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
62285557509470724835499121556102192012995.363408979825640396152800
25 × 3 × 52 × 7 × 61 × 71 × 73 × 103 × 17321 × 43159
2013-03-161732143159245,934,2340.06380.1201

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-03-16s5s5a2012Fady2995.3631.8290.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-30Gordon Spencev4_computers212590.001
2022-03-30LordJuliusManual testing21263
2008-12-18DerekDerek_Desk2632640.032
2009-02-20Ken Hiattkenhia22642660.180
2009-08-10ANONYMOUSCarnegie32662670.240
2009-08-15ANONYMOUSCarnegie32672680.480
2009-08-18ANONYMOUSCarnegie32682690.960
2011-12-05GIMP Philippinesbuyer052692701.920
2013-02-19Carsten KossendeyManual testing2702713.839
2013-02-28bcp19Manual testing2712727.678
2013-03-14Kevin JagetManual testing27227315.36


ECM factoring results:
No ECM results for M62285557


Lucas-Lehmer results:
No L-L results for M62285557


PRP results:
No PRP results for M62285557


CERT results:
No CERT results for M62285557


P-1 factor-bounds graph:
103
104
105
103
104
105
TF factor-bounds graph:
273
272
271
270
269
268
267
266
264
263
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00