is 2 2525123 - 1
has 760138 decimal digits
takes 0.175 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBE05760E69B90145double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.767367.1642%30000080000000.07244.3815%11.839768.6029%1.4387%
PrimeNet2590.030462.7119%110001900000.00212.6439%0.032563.6977%0.9859%
GPU722630.632165.0794%110001800000.00201.4344%0.634165.5803%0.5009%
Difference+4+11.1353+2.0848%+289000+7820000+0.0703+2.9471%+11.2056+3.0226%+3.0226%

Known prime factors (1 factor, 65.6 bits, 0.00259869% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2525123567084036737678070072065.62011228839877061
32 × 1247648875229
2015-08-02912476488752295.47776,836.512,769

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-23T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.292%
2003-10-31T00:00:00Team Prime Ribv4_computers15000236250---0.003--0.931%
2010-12-19T21:41:00Jocelyn LaroucheManual testing2000020000---0.002--0.315%
2011-01-02T14:09:00Jocelyn LaroucheManual testing3000030000---0.003--0.432%
2011-01-06T23:25:00Jocelyn LaroucheManual testing5000050000---0.005--0.618%
2011-03-12T07:42:00James HeinrichWHS3000008000000---0.072--4.382%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.030--
2022-03-10T03:34:12LordJuliusManual testing21260--0.061--
2009-02-14T19:15:00Sturle Sundefigaro.ifi260261--0.061--
2012-06-13T21:43:00Sebastian HornbostelManual testing261262--0.122--
2013-01-14T11:53:00dbaughManual testing262263--0.389--
2015-02-23T17:24:00VictordeHollanderManual testing263264--0.778--
2015-02-23T17:24:00VictordeHollanderManual testing264265--1.480--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.381 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:1.381 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.105
50000500000030.276


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-23T00:00:00ANONYMOUSv4_computersBE05760E69B901450.175


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-14T13:24:35kkmrkkblmbrbkc4.xlarge61B6A55987991E__no
2017-11-08T13:39:37Oliver KruseThreadripper
56708403673767807007
61B6A55987991E__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 8000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000, B2 = 236250 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-10T03:34:12+00:00