is 2 6426989 - 1
has 1934717 decimal digits
takes 1.205 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0AE6C934359BF284double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.623365.6716%300004125000.01381.6259%4.637166.2298%0.5581%
PrimeNet2620.095662.9032%280006500000.01683.4830%0.112464.1953%1.2921%
GPU722662.297965.1515%4500010000000.02642.5744%2.324266.0487%0.8971%
Difference+1+2.3254+0.5201%-15000-587500-0.0126-0.9485%+2.3129+0.1811%+0.1811%

Known prime factors (1 factor, 66.5 bits, 0.00103496% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
64269891055549268641969503912166.5178211849037255
5 × 1642369807451
2011-12-06516423698074513.624224,31945,420

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-02-11T00:00:00ANONYMOUSv4_computers30000412500---0.014--1.626%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21261--0.048--
1998-07-21T00:00:00ANONYMOUSv4_computers21262--0.096--


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)
1999-01-29T00:00:00Stephen Woodv4_computers0AE6C934359BF2841.205
2001-03-11T00:00:00ANONYMOUSv4_computers0AE6C934359BF2841.205


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-18T04:45:30RuzovejDESK_A_SMALL
105554926864196950391
C1F2D29032E78A__no
2018-06-30T07:52:28kkmrkkblmbrbkc5.large
105554926864196950391
C1F2D29032E78A__no


P-1 factor-bounds graph:
B1 = 30000, B2 = 412500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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100
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1010
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TF factor-bounds graph:
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2100
Last modified: 2018-06-30T07:52:28+00:00