is 2 62550583 - 1
has 18829602 decimal digits
takes 146.936 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
Actual27330.580864.3836 %----30.580864.3836 %
Target27461.164364.8649 %4000006500000013.35073.7260 %74.515166.1740 %
Difference-1-30.5836-0.4813 %-400000-65000000-13.3507-3.7260 %-43.9343-1.7904 %

Known prime factors (1 factor, 74.1 bits, 0.00011849% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
62550583204747406486179805569612374.116163665466144560
24 × 33 × 5 × 37 × 827 × 853 × 2903
2013-04-06853290386.5840.00330.0059

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-04-06Brian ChanBGC2374.1162.0270.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-07-06Gordon Spencev4_computers212590.001
2022-03-30LordJuliusManual testing21263
2009-01-25Wojciech Florekarmada22632640.031
2009-02-17ANONYMOUS2642650.060
2009-02-24Sergey MiklinDIAKOM-AUTO2652660.119
2009-08-07Sturle Sundebruch.ifi2662670.239
2009-08-15Michael Hanschomicha_cl22672680.478
2009-08-17CreweNetWork2682690.956
2011-12-12juliano2692701.911
2013-03-11Florimond C.Manual testing2702713.823
2013-03-31GrunwalderGIMPManual testing27127322.94


ECM factoring results:
No ECM results for M62550583


Lucas-Lehmer results:
No L-L results for M62550583


PRP results:
No PRP results for M62550583


CERT results:
No CERT results for M62550583


P-1 factor-bounds graph:
101
102
103
101
102
103
104
TF factor-bounds graph:
273
271
270
269
268
267
266
265
264
263
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00