is 2 10898399 - 1
has 3280746 decimal digits
takes 3.560 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6C0D3B7053AC0034double-checked
PRP13CE16F26FE603B1verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672.726464.1791%500000150000000.61106.2602%3.337566.4216%2.2425%
PrimeNet2640.326662.5000%4500013000000.05373.7936%0.380363.9226%1.4226%
GPU722685.469164.7059%7000017000000.07522.7204%5.544465.6660%0.9602%
Difference-1-2.7427-0.5268%+430000+13300000+0.5358+3.5398%-2.2069+0.7555%+0.7555%

Known prime factors (1 factor, 77.4 bits, 0.00071000% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
108983991964681123679620462257512477.3799013622659987125
3 × 53 × 659 × 158923 × 229507
2017-01-101589232295075,024.30.07710.1532

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-15T00:00:00ANONYMOUSv4_computers1250001625000---0.098--3.340%
2021-03-22T17:55:17riccardo ubertiColab_noGPU145000001500000012-
skipped known factor: 196468112367962046225751
--0.611--6.260%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-01T00:00:00ANONYMOUSv4_computers21264--0.327--
1999-12-15T00:00:00ANONYMOUSv4_computers21264--0.327--
2013-12-08T00:32:00lycornManual testing264265--0.343--
2015-05-20T06:25:00ThaManual testing265266--0.686--
2015-12-11T23:18:38VictordeHollanderManual testing266267--1.371--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.607 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

New Calculation Method

Total ECM effort:10.607 GHz-days
Estimated T-Level:0.600
DigitsB1CompleteFacMiss
20110000.57756.162%
25500000.05594.608%
302500000.00499.643%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.497
50000500000010.497
5000014400000109.61


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-12-14T00:00:00ANONYMOUSv4_computers6C0D3B7053AC00343.560
2004-03-08T00:00:00kggv4_computers6C0D3B7053AC00343.560
2004-08-04T00:00:00kggv4_computers6C0D3B7053AC00343.560


PRP results:
dateuseridcompidcofactorsres64PRP
2021-03-22T04:38:44riccardo ubertiNomad2C
196468112367962046225751
13CE16F26FE603B1no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 125000, B2 = 1625000 (P-1 stage 2)
B1 = 125000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
250
260
270
280
290
2100
Last modified: 2021-03-25T14:33:20+00:00