is 2 6902759 - 1
has 2077938 decimal digits
takes 1.505 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L278F01AE24A3F3B0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.304665.6716%13000026650000.08483.5282%4.389466.8828%1.2112%
PrimeNet2630.231263.4921%280007000000.02043.1587%0.251664.6453%1.1532%
GPU722674.304665.6716%450009000000.02902.2354%4.333666.4390%0.7674%
Difference---+85000+1765000+0.0558+1.2929%+0.0558+0.4438%+0.4438%

Known prime factors (1 factor, 73.2 bits, 0.00106033% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6902759107894132211599205434332373.192781529039414524
22 × 3818641 × 51165391
2017-03-24381864151165391388.932.02302.4572

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-11-24T00:00:00AZMangov4_computers35000341250---0.016--1.618%
2011-11-19T14:29:00James Heinrichi7-9201300002665000---0.085--3.528%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-29T00:00:00ANONYMOUSv4_computers21261--0.045--
1998-07-05T00:00:00slaurv4_computers21262--0.089--
2005-01-20T00:00:00ANONYMOUSv4_computers21263--0.231--
2014-02-09T10:09:00NesowaManual testing263264--0.284--
2014-02-17T23:33:00lycornManual testing264265--0.541--
2015-06-21T19:55:00VictordeHollanderManual testing265266--1.083--
2016-03-31T14:38:49Gordon SpenceManual testing266267--2.165--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.989 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:1.989 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.19482.403%
25500000.01798.266%
302500000.00199.892%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.995
50000500000030.995


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02T00:00:00ANONYMOUSv4_computers278F01AE24A3F3B01.505
2001-12-22T00:00:00AZMangov4_computers278F01AE24A3F3B01.505


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-21T23:01:43Oliver KruseGTX-3
10789413221159920543433
E3D167B311CEB3__no
2019-01-22T12:42:16krackerGRID-11
10789413221159920543433
E3D167B311CEB365no


P-1 factor-bounds graph:
B1 = 130000, B2 = 2665000 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 35000, B2 = 341250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2019-01-22T12:42:16+00:00