is 2 66687667 - 1
has 20074989 decimal digits
takes 168.572 GHz-days to do one PRP test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27457.369964.8649%----57.369964.8649%2.0077%
PrimeNet2703.583162.8571%280000130000003.56645.3158%7.149568.1730%5.3158%
GPU7227457.369964.8649%450000150000004.55493.9261%61.924868.7910%3.9261%
Difference----450000-15000000-4.5549-3.9261%-4.5549-3.9261%-3.9261%

Known prime factors (1 factor, 74.7 bits, 0.00011207% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
66687667314329269625591162579192374.735235672714135877
19 × 3433 × 7673 × 470887
76734708872013-09-0864.2870.12060.1756

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-09-08T19:11:00Ge yongJuRen2374.735-337.1-0.000%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-02T00:59:001997rj7Manual testing?264--0.029--
2009-03-30T21:30:00Sturle Sundegideon.ifi264265--0.056--
2009-03-31T14:15:00CPSlackerbf-st-2k3-64-2p265266--0.112--
2009-04-01T11:06:00CPSlackerbf-st-2k3-64-2p266267--0.224--
2009-04-02T19:20:00dgriffie79267268--0.448--
2009-11-09T18:44:00steinrardfi268269--0.896--
2013-04-26T12:21:00timc995dl580_g5269270--1.793--
2013-06-14T10:38:00Kyle AskineManual testing270271--3.586--
2013-06-14T14:42:00Kyle AskineManual testing271272--7.172--
2013-06-14T18:46:00Kyle AskineManual testing272273--14.34--
2013-09-06T22:42:00Jerry HallettManual testing273274--28.69--


ECM factoring results:
Exponent "66687667" not found


Lucas-Lehmer results:
Exponent "66687667" not found


PRP results:
Exponent "66687667" not found


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
265
264
250
260
270
280
290
2100
Last modified: 2013-09-08T19:11:03+00:00