is 2 2006231 - 1
has 603936 decimal digits
takes 0.132 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.810868.6567%500000150000000.12305.1250%14.933870.2631%1.6063%
PrimeNet2580.019163.7931%80001400000.00142.4803%0.020664.6912%0.8981%
GPU722620.306266.1290%80001100000.00131.2375%0.307566.5482%0.4191%
Difference+5+14.5046+2.5277%+492000+14890000+0.1217+3.8875%+14.6263+3.7149%+3.7149%

Known prime factors (2 factors, 101.2 bits, 0.00504358% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
200623116049849823.9364
22
-445.575e-133.813e-77.761e-7
20062311796746888030873793974492477.25044779162719319804
22 × 907 × 12342657860893
2021-07-259071234265786089318,83664,111119,741

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2006231288375162441154317313476743520131101.186
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:19:27alpertronManual testing5000001500000012-
skipped known factor: 16049849
--0.123--5.125%


Trial Factoring results:
No TF results for M2006231


ECM factoring results:

Old Calculation Method

Total ECM effort:3.215 GHz-days
Estimated T-Level:1.850
DigitsB1CurvesCompleteFacMiss
201100037 / 1000.37068.945%
255000037 / 2800.13287.601%

New Calculation Method

Total ECM effort:3.215 GHz-days
Estimated T-Level:1.850
DigitsB1CompleteFacMiss
20110001.20929.846%
25500000.11089.618%
302500000.00799.326%


ECM Summary

B1B2factorcurvesGHz-days
500005000000272.285
50000500000030.254
50000675000070.676


Lucas-Lehmer results:
No L-L results for M2006231


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T20:16:15Oliver KruseGTX-2
16049849
BDA2346C980804__no
2017-11-13T11:15:14kkmrkkblmbrbkc4.xlarge
16049849
BDA2346C980804__no
2021-07-25T19:18:33SRJ2877LTOS
16049849
179674688803087379397449
DAF1264AA42AF7CAno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-25T15:48:44+00:00