is 2 1926361 - 1
has 579893 decimal digits
takes 0.105 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
Actual26715.424968.6567%500000150000000.10155.1000%15.526470.2552%1.5985%
PrimeNet2570.010063.1579%90001700000.00143.0947%0.011464.2981%1.1402%
GPU722610.159565.5738%110001700000.00151.8141%0.161066.1983%0.6245%
Difference+6+15.2654+3.0829%+489000+14830000+0.0999+3.2859%+15.3654+4.0569%+4.0569%

Known prime factors (2 factors, 111.5 bits, 0.00578996% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
192636137299126335291341.762968124
22 × 3 × 80677
-4806772.358e-70.00030.0006
192636110089079600220350494412269.773261868870897520
24 × 5 × 397 × 8245241527
2021-08-15397824524152783.20235.33766.000

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1926361376313854615415980013042202930728934111.536
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:19:05alpertronManual testing5000001500000012-
skipped known factor: 3729912633529
--0.101--5.100%


Trial Factoring results:
No TF results for M1926361


ECM factoring results:

Old Calculation Method

Total ECM effort:19.260 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.260 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.5510.019%
25500000.77546.092%
302500000.04895.323%
3510000000.00299.780%


ECM Summary

B1B2factorcurvesGHz-days
500005000000271.876
500005000000201.390
50000660000020415.99


Lucas-Lehmer results:
No L-L results for M1926361


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T00:03:10Oliver KruseGTX-3
3729912633529
9173D27D11BBEA__no
2017-11-10T11:06:11Chang Chia-Tcheexbpc13
3729912633529
9173D27D11BBEA__no
2021-08-15T06:19:45SRJ2877LTOS
3729912633529
1008907960022035049441
A6F2736A1A2B8694no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2022-03-10T10:40:47+00:00