is 2 5214779 - 1
has 1569805 decimal digits
takes 0.824 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L962261BEF49F6577double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.698065.6716%2500000655524870082.320714.5700%88.018770.6733%5.0017%
PrimeNet2620.117862.9032%220005000000.01103.0042%0.128864.0177%1.1145%
GPU722662.832065.1515%300006000000.01401.9882%2.846065.8444%0.6929%
Difference+1+2.8660+0.5201%+2470000+6554648700+82.3067+12.5819%+85.1727+4.8289%+4.8289%

Known prime factors (2 factors, 131.7 bits, 0.00252642% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
521477965032802656044284171962.496623543228352
26 × 32 × 11 × 98412757
2009-06-1864984127570.25771.22782.2931
52147797027482286692999038872169.25267380442073317
73 × 923019754429
2022-01-287392301975442929.33111,51521,507

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
5214779457016868719352627571886284745967155687940131.747
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-01-28T14:19:53happy5214Manual testing25000006555248700-
skipped known factor: 6503280265604428417
--82.32--14.570%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-01-28T14:19:53happy5214Manual testing12500004625000027P+12169.2520.985


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-05T00:00:00ANONYMOUSv4_computers21261--0.059--
1998-05-23T00:00:00ANONYMOUSv4_computers21262--0.118--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02T00:00:00ANONYMOUSv4_computers962261BEF49F65770.824
2000-05-31T00:00:00ANONYMOUSv4_computers962261BEF49F65770.824


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-23T11:33:18kkmrkkblmbrbkc4.xlarge
6503280265604428417
95450A4E538C90__no
2018-05-27T14:55:11BattlemaxxWork
6503280265604428417
95450A4E538C90__no
2022-01-29T04:35:58happy5214Manual testing
6503280265604428417
702748228669299903887
95450A4E538C9078no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 6555248700 (P-1 stage 2)
B1 = 1250000, B2 = 46250000 (P+1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 1250000 (P+1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-01-29T04:35:58+00:00