is 2 6351649 - 1
has 1912037 decimal digits
takes 1.126 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE87227C0521E6537double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.678165.6716%300002850000.01131.4547%4.689466.1710%0.4994%
PrimeNet2620.096762.9032%280006000000.01523.4115%0.111964.1688%1.2656%
GPU722662.325165.1515%4500010000000.02492.5695%2.350166.0469%0.8954%
Difference+1+2.3530+0.5201%-15000-715000-0.0137-1.1148%+2.3394+0.1241%+0.1241%

Known prime factors (1 factor, 68.0 bits, 0.00107037% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
63516492922695211899426772792167.98623007373454511
32 × 738547 × 3461357
2011-11-1373854734613575.52460.22790.3862

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-01-28T00:00:00Jim Renneyv4_computers30000285000---0.011--1.455%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-29T00:00:00ANONYMOUSv4_computers21262--0.097--


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)
1999-09-30T00:00:00ANONYMOUSv4_computersE87227C0521E65371.126
2001-02-18T00:00:00Jim Renneyv4_computersE87227C0521E65371.126


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-29T22:36:00kkmrkkblmbrbkc4.xlarge
292269521189942677279
212858A4639AB1__no
2018-09-27T16:58:35ANONYMOUS
292269521189942677279
212858A4639AB1__no


P-1 factor-bounds graph:
B1 = 30000, B2 = 285000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
267
262
250
260
270
280
290
2100
Last modified: 2018-09-27T16:58:35+00:00