is 2 3892249 - 1
has 1171684 decimal digits
takes 0.485 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB0E89EA25781861Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.634167.1642%2000001303648501.31876.8409%8.952869.4104%2.2463%
PrimeNet2600.039563.3333%170003600000.00653.2466%0.045964.5237%1.1904%
GPU722640.914565.6250%240005000000.00902.2326%0.923566.3924%0.7674%
Difference+3+6.7197+1.5392%+176000+129864850+1.3097+4.6083%+8.0293+3.0180%+3.0180%

Known prime factors (1 factor, 72.1 bits, 0.00185359% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
389224952260689730341496328632272.146671343094061319
3 × 109 × 215981 × 9505637
2009-10-202159819505637474.370.13060.1749

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-17T22:55:21Jocelyn LaroucheManual testing200000200000---0.036--1.479%
2022-05-25T14:13:58Jocelyn LaroucheManual testing200000130364850---1.319--6.841%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-08-16T00:00:00ANONYMOUSv4_computers21260--0.039--
2007-01-16T00:00:00Richard B. Woodsv4_computers21262--0.158--
2007-05-28T00:00:00Richard B. Woodsv4_computers21263--0.410--


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)
1998-04-11T00:00:00ANONYMOUSv4_computersB0E89EA25781861D0.485
1999-09-07T00:00:00ANONYMOUSv4_computersB0E89EA25781861D0.485


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T16:57:50kkmrkkblmbrbkManual testing
5226068973034149632863
AA8A3E1F3A2FB9__no
2017-12-27T13:53:42Oliver KruseGTX-4
5226068973034149632863
AA8A3E1F3A2FB9__no


P-1 factor-bounds graph:
B1 = 200000, B2 = 130364850 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
104
105
106
104
105
106
107
108
109
TF factor-bounds graph:
267
263
262
260
250
260
270
280
290
2100
Last modified: 2022-05-25T14:13:58+00:00