is 2 68297821 - 1
has 20559693 decimal digits
takes 182.602 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27456.017463.5135%----56.017463.5135%0.0000%
PrimeNet2703.498761.4286%300000130000003.84555.3790%7.344163.5033%2.0747%
GPU7227456.017463.5135%450000150000004.81773.9378%60.835164.9503%1.4368%
Difference----450000-15000000-4.8177-3.9378%-4.8177-1.4368%-1.4368%

Known prime factors (1 factor, 79.8 bits, 0.00011686% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6829782110608404017898251463217192579.8117766282922773079
3 × 5903 × 250403 × 1751377
2013-11-0325040317513773,321.01.28781.9756

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-11-03T18:33:00Jwb52zClay2579.811-365.2-0.000%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-11-24T00:30:001997rj7Manual testing21264--0.052--
2010-01-14T20:20:00Yih-Dar Shiehgrothendieck264265--0.055--
2010-01-17T01:30:00Sturle Sundekiwavi.ifi265266--0.109--
2010-07-02T19:21:00GrunwalderGIMPcompute-0-2266267--0.219--
2010-07-03T20:41:00GrunwalderGIMPcompute-0-2267268--0.438--
2010-07-13T19:58:00ANONYMOUS268269--0.875--
2012-03-09T17:04:00Andrewwork_comp269270--1.751--
2012-08-07T15:24:00Alex_Wu_MalaysiaManual testing270271--3.501--
2012-08-07T15:24:00Alex_Wu_MalaysiaManual testing271272--7.002--
2013-10-13T22:41:00Jerry HallettManual testing272273--14.00--
2013-10-28T23:11:00Jerry HallettManual testing273274--28.01--


ECM factoring results:
No ECM results for M68297821


Lucas-Lehmer results:
No L-L results for M68297821


PRP results:
No PRP results for M68297821


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
265
264
250
260
270
280
290
2100
Last modified: 2013-11-03T18:33:34+00:00