is 2 1935181 - 1
has 582548 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
Actual26715.354668.6567%500000150000000.10155.1028%15.456170.2561%1.5994%
PrimeNet2580.019863.7931%80001400000.00122.4631%0.021064.6849%0.8918%
GPU722620.317566.1290%8000900000.00101.1512%0.318566.5190%0.3899%
Difference+5+15.0371+2.5277%+492000+14910000+0.1005+3.9516%+15.1376+3.7371%+3.7371%

Known prime factors (3 factors, 194.0 bits, 0.01002703% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1935181155333534247831443.8204013411
17 × 307 × 769
-3077691.032e-62.613e-54.915e-5
193518112347713084587977078232270.065319032511289331
3 × 7 × 83 × 183036437917
2020-11-1583183036437917152.12784.451,465.1
193518113469865653040828505881592580.156348025989637166459
4933 × 268777 × 262487399
2022-03-17268777262487399185,6661.14492.1011

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
19351811918013913307225147225898724117740935113.885
19351812092321837730286542899635688851694449738123.976
1935181166322036371694414779099857057510313658546785746150.221
193518125835389732911421289696436950342235836593322561119
313700031
59194.041
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:41:03alpertronManual testing5000001500000012-
skipped known factor: 15533353424783
--0.101--5.103%


Trial Factoring results:
No TF results for M1935181


ECM factoring results:

Old Calculation Method

Total ECM effort:20.461 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:20.461 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
20110008.8250.015%
25500000.78545.619%
302500000.04995.249%
3510000000.00299.776%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.390
50000500000050.348
50000670000070.553
50000675000070.555
5000075000001068.849
5000075000001058.766


Lucas-Lehmer results:
No L-L results for M1935181


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T02:04:08Oliver KruseGTX-3
15533353424783
D5D69E0030E647__no
2017-11-10T20:58:28ATHec2-1xf
15533353424783
D5D69E0030E647__no
2020-11-17T03:00:41Poaopc-Home
15533353424783
1234771308458797707823
7E84D1214D52D8C4no
2022-03-20T08:43:56SRJ2877LTOS
15533353424783
1234771308458797707823
1346986565304082850588159
7E84D1214D52D8C4no


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
1011
1012
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2022-03-20T08:43:56+00:00