is 2 8712713 - 1
has 2622788 decimal digits
takes 2.275 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L054B56051DB630B5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.410464.1791%16000033200000.12583.9436%3.536265.5918%1.4126%
PrimeNet2640.408562.5000%3600010000000.03353.3097%0.442063.7411%1.2411%
GPU722686.841164.7059%5500012000000.04442.2975%6.885665.5168%0.8109%
Difference-1-3.4307-0.5268%+105000+2120000+0.0813+1.6461%-3.3494+0.0750%+0.0750%

Known prime factors (1 factor, 68.9 bits, 0.00079025% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
87127135328173463887561127772168.85230577005485476
22 × 11329 × 674750761
2013-12-281132967475076111.85513.92325.996

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-12-02T00:00:00ANONYMOUSv4_computers45000720000---0.031--2.195%
2002-12-09T00:00:00ANONYMOUSv4_computers45000720000---0.031--2.195%
2012-05-25T19:24:00James Heinrichi7-9201600003320000---0.126--3.944%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-25T00:00:00ANONYMOUSv4_computers21262--0.071--
1998-12-06T00:00:00ANONYMOUSv4_computers21262--0.071--
1999-01-29T00:00:00ANONYMOUSv4_computers21263--0.183--
1999-10-29T00:00:00ANONYMOUSv4_computers21264--0.409--


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)
1999-12-15T00:00:00ANONYMOUSv4_computers054B56051DB630B52.275
2002-12-09T00:00:00ANONYMOUSv4_computers054B56051DB630B52.275


PRP results:
dateuseridcompidcofactorsres64PRP
2019-01-02T09:08:39Oliver KruseGTX-2
532817346388756112777
47FD988FD979EB__no
2020-08-25T16:14:31marssystemssystem11
532817346388756112777
47FD988FD979EBAEno


P-1 factor-bounds graph:
B1 = 160000, B2 = 3320000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
B1 = 45000, B2 = 720000 (P-1 stage 2)
B1 = 45000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
TF factor-bounds graph:
267
264
263
262
250
260
270
280
290
2100
Last modified: 2020-08-25T16:14:31+00:00