is 2 1846121 - 1
has 555738 decimal digits
takes 0.100 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
Actual26716.095368.6567%500000283586457012.191010.3815%28.286371.9106%3.2539%
PrimeNet2570.010463.1579%90001600000.00143.0219%0.011864.2712%1.1133%
GPU722610.166465.5738%90001500000.00131.6303%0.167766.1350%0.5612%
Difference+6+15.9289+3.0829%+491000+2835714570+12.1897+8.7513%+28.1186+5.7756%+5.7756%

Known prime factors (3 factors, 153.7 bits, 0.00832775% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1846121236303489927.81664
26
-64649.819e-125.034e-61.025e-5
18461218285433364896329271859.523224401146103
192 × 2551 × 243673
2014-03-3125512436730.06850.00120.0020
1846121974203965285431741112066.40126385160162455
34 × 5 × 79 × 824665109
2017-12-15818246651099.9183.53436.6011

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
18461211957876812002012729793823032787.339
1846121230207795994582401295637732792994.217
18461218071702038190221459972800768183955289738125.924
18461211907371353792760576674246666623748828776115763347153.740
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-11T14:23:09Lisander ViaeneDesktop5000002835864570-
skipped known factor: 236303489
skipped known factor: 828543336489632927
skipped known factor: 97420396528543174111
--12.19--10.382%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-04-24T12:16:00ANONYMOUSManual testing2126159.523180.0680.2040.139


ECM factoring results:

Old Calculation Method

Total ECM effort:19.269 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:19.269 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
201100010.3290.003%
25500000.95238.602%
302500000.06094.131%
3510000000.00399.716%


ECM Summary

B1B2factorcurvesGHz-days
500005000000261.798
50000500000010.069
50000610000070.526
50000660000021516.76
84000840000010.116


Lucas-Lehmer results:
No L-L results for M1846121


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T05:21:08Oliver KruseGTX-3
236303489
828543336489632927
287F80E31DA173__no
2017-11-06T23:11:59kkmrkkblmbrbkold
236303489
828543336489632927
287F80E31DA173__no
2017-12-17T04:09:24kkmrkkblmbrbkc4.xlarge
236303489
828543336489632927
97420396528543174111
D26E59EE7CA4DB__no
2017-12-17T10:03:23ATHec2-1xd
236303489
828543336489632927
97420396528543174111
D26E59EE7CA4DB__no
2017-12-20T21:48:23noknopcr2-srv?


P-1 factor-bounds graph:
B1 = 500000, B2 = 2835864570 (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
261
220
230
240
250
260
270
280
290
2100
Last modified: 2022-04-11T14:23:09+00:00