is 2 11943493 - 1
has 3595350 decimal digits
takes 4.598 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA605316A27AF16F0double-checked
PRPB9E47F21BA74F964verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672.487964.1791%400000120000000.57615.9358%3.064066.3054%2.1263%
PrimeNet2640.298062.5000%5500015000000.07474.1109%0.372764.0416%1.5416%
GPU722684.990664.7059%8000020000000.10312.9390%5.093665.7432%1.0373%
Difference-1-2.5027-0.5268%+320000+10000000+0.4731+2.9968%-2.0296+0.5622%+0.5622%

Known prime factors (1 factor, 89.6 bits, 0.00075059% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
119434939686870842024374142741681512789.64640552922172870089775
32 × 52 × 13 × 71778419 × 193153417
2017-09-257177841919315341720,346,60843.76281.550

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-04-08T00:00:00ANONYMOUSv4_computers115000546250---0.077--2.499%
2016-04-25T23:11:43ThaManual testing30000060000006---0.341--5.036%
2021-11-20T19:40:03nordisweet16400000400000---0.223--2.403%
2021-11-21T06:20:36nordisweet1640000012000000---0.576--5.936%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-02-23T00:00:00ANONYMOUSv4_computers21264--0.298--
2013-10-07T21:51:00lycornManual testing264265--0.313--
2013-10-20T06:14:00NesowaManual testing265266--0.626--
2016-03-03T15:31:28YxinityManual testing266267--1.251--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.585
50000500000010.585


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-05-20T00:00:00ANONYMOUSv4_computersA605316A27AF16F04.598
2004-05-11T00:00:00Team Prime Ribv4_computersA605316A27AF16F04.598


PRP results:
dateuseridcompidcofactorsres64PRP
2021-12-07T17:03:36Joe S.VMWare1
968687084202437414274168151
B9E47F21BA74F964no


P-1 factor-bounds graph:
B1 = 400000, B2 = 12000000 (P-1 stage 2)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 115000, B2 = 546250 (P-1 stage 2)
B1 = 115000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2021-12-07T17:03:36+00:00