is 2 7769831 - 1
has 2338953 decimal digits
takes 1.778 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L61C72A664655B718double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.824365.6716%9500017812500.06203.1118%3.886366.7399%1.0682%
PrimeNet2630.205463.4921%340009000000.02693.5498%0.232364.7880%1.2960%
GPU722673.824365.6716%5000011000000.03562.4513%3.859866.5131%0.8415%
Difference---+45000+681250+0.0264+0.6605%+0.0264+0.2267%+0.2267%

Known prime factors (1 factor, 66.5 bits, 0.00085554% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
77698311024752839021566898172166.4746594434544468
22 × 3 × 141793 × 3875623
2013-04-0114179338756232.89500.11450.1308

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-07-27T00:00:00ANONYMOUSv4_computers40000580000---0.023--1.980%
2012-08-26T06:13:00NesowaWork950001781250---0.062--3.112%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-18T00:00:00ANONYMOUSv4_computers21261--0.040--
1998-10-18T00:00:00ANONYMOUSv4_computers21262--0.079--
1999-08-22T00:00:00ANONYMOUSv4_computers21263--0.205--


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)
1999-10-21T00:00:00ANONYMOUSv4_computers61C72A664655B7181.778
2001-09-10T00:00:00ANONYMOUSv4_computers61C72A664655B7181.778
2002-08-17T00:00:00ANONYMOUSv4_computers61C72A664655B7181.778


PRP results:
dateuseridcompidcofactorsres64PRP
2018-05-06T01:16:49BattlemaxxWork
102475283902156689817
36B8BDF50A3302__no
2019-09-27T00:52:52marssystemssystem11
102475283902156689817
36B8BDF50A330258no


P-1 factor-bounds graph:
B1 = 95000, B2 = 1781250 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 40000, B2 = 580000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
267
263
262
261
250
260
270
280
290
2100
Last modified: 2019-09-27T00:52:52+00:00