is 2 2000393 - 1
has 602179 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
Actual26714.854068.6567%500000150000000.12305.1232%14.977070.2625%1.6058%
PrimeNet2580.019263.7931%80001400000.00142.4789%0.020664.6907%0.8975%
GPU722620.307166.1290%80001100000.00131.2367%0.308466.5479%0.4189%
Difference+5+14.5469+2.5277%+492000+14890000+0.1217+3.8865%+14.6686+3.7146%+3.7146%

Known prime factors (2 factors, 106.7 bits, 0.00533528% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
200039321244173671030.984531
32 × 59
-9597.973e-111.118e-61.746e-6
2000393631958334824936486146632375.74215795854485217067
3 × 283 × 18605246743483
2022-06-08283186052467434835,188.996,640180,497

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
200039313425432617224959758418556805232133106.727
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:19:21alpertronManual testing5000001500000012-
skipped known factor: 2124417367
--0.123--5.123%
2019-01-17T11:07:58Jocelyn LaroucheManual testing10000001000000012-
skipped known factor: 2124417367
--0.142--5.069%


Trial Factoring results:
No TF results for M2000393


ECM factoring results:

Old Calculation Method

Total ECM effort:3.819 GHz-days
Estimated T-Level:2.100
DigitsB1CurvesCompleteFacMiss
201100042 / 1000.42065.566%
255000042 / 2800.15086.048%

New Calculation Method

Total ECM effort:3.819 GHz-days
Estimated T-Level:2.100
DigitsB1CompleteFacMiss
20110001.68418.559%
25500000.15685.567%
302500000.01099.017%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.692
50000590000010.091
500006750000141.352
50000694763570.685


Lucas-Lehmer results:
No L-L results for M2000393


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T18:44:52Oliver KruseGTX-0
2124417367
1B001F1DDE9EC6__no
2017-11-13T05:53:54kkmrkkblmbrbkc4.xlarge
2124417367
1B001F1DDE9EC6__no
2022-06-14T09:04:22Poaooffice-CN3
2124417367
63195833482493648614663
2D9D9EB31FF8BC__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 10000000 (P-1 stage 2)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-06-16T10:29:37+00:00