is 2 6920833 - 1
has 2083379 decimal digits
takes 1.509 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE8D7F2B2C6515DF2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.293465.6716%13000028275000.08763.5757%4.381066.8991%1.2275%
PrimeNet2630.230663.4921%280007000000.02043.1601%0.251064.6457%1.1537%
GPU722674.293465.6716%450009000000.02902.2363%4.322466.4393%0.7677%
Difference---+85000+1927500+0.0586+1.3394%+0.0586+0.4598%+0.4598%

Known prime factors (1 factor, 64.4 bits, 0.00093098% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6920833248740549797124666312064.4311797041987555
5 × 359408397511
2012-08-2453594083975110.60956,191.311,564

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-31T00:00:00ANONYMOUSv4_computers35000341250---0.016--1.619%
2011-11-22T15:32:00James Heinrichi7-9201300002827500---0.088--3.576%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-29T00:00:00ANONYMOUSv4_computers21262--0.089--
2004-10-03T00:00:00ANONYMOUSv4_computers21263--0.231--


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)
1999-07-30T00:00:00ANONYMOUSv4_computersE8D7F2B2C6515DF21.509
2001-11-03T00:00:00ANONYMOUSv4_computersE8D7F2B2C6515DF21.509


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-25T20:34:47RuzovejAcer_Osek
24874054979712466631
595E5DEDE0D589__no
2019-01-25T12:52:34kkmrkkblmbrbkc5.large
24874054979712466631
595E5DEDE0D58988no


P-1 factor-bounds graph:
B1 = 130000, B2 = 2827500 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 35000, B2 = 341250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-01-25T12:52:34+00:00