is 2 1195121 - 1
has 359768 decimal digits
takes 0.037 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L21BB58B67A32ECB1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26724.862768.6567%300000100000000.03684.1591%24.899569.9603%1.3036%
PrimeNet2560.008062.5000%5000800000.00042.2681%0.008463.3505%0.8505%
GPU722600.128565.0000%5000280000.00030.8021%0.128865.2807%0.2807%
Difference+7+24.7342+3.6567%+295000+9972000+0.0366+3.3569%+24.7707+4.6796%+4.6796%

Known prime factors (2 factors, 149.8 bits, 0.01253429% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1195121101300542281749700792063.1354238087284959
3 × 11 × 49369 × 2601367
2009-09-294936926013671.60530.00840.0118
11951211226439479636309259282277672786.66551310263966423034123
73 × 2061793 × 340907321107
2018-07-27206179334090732110718,173,535825.991,542.6

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1195121124238984362905047269486690788185403672198359346149.800
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-05-11T00:00:00Jocelyn Larouchev4_computers10001000---4.44667e-5--0.005%
2002-09-22T00:00:00Jocelyn Larouchev4_computers40004000---0.000--0.049%
2002-09-22T00:00:00Jocelyn Larouchev4_computers50005000---0.000--0.065%
2002-09-29T00:00:00Jocelyn Larouchev4_computers80008000---0.000--0.111%
2002-10-07T00:00:00Jocelyn Larouchev4_computers1000010000---0.000--0.140%
2003-09-21T00:00:00ANONYMOUSv4_computers100001000000---0.003--0.991%
unknown30000010000000---0.037--4.159%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-07-27T00:00:00ANONYMOUSv4_computers21256--0.008--
2001-10-27T00:00:00ANONYMOUSv4_computers21257--0.016--
2003-05-19T00:00:00ANONYMOUSv4_computers21258--0.032--
2022-03-07T17:31:16LordJuliusManual testing258260--0.096--
2009-02-16T06:23:00Sturle Sundeantonov.ifi260261--0.129--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.426 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000324 / 1003.2403.853%
2550000324 / 2801.15731.373%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:18.426 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.7690.000%
25500001.61619.866%
302500000.13187.697%
3510000000.00999.130%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000001796.597
5000050000001013.722
25000025000000448.107


Lucas-Lehmer results:
No L-L results for M1195121


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T12:24:27Oliver KruseGTX-0
10130054228174970079
7C38F67C09C39A__no
2017-10-17T20:19:10Oliver KruseThreadripper
10130054228174970079
7C38F67C09C39A__no
2018-01-02T20:38:34ATHec2-8x
10130054228174970079
7C38F67C09C39A__no
2018-07-28T11:47:35Gabriel Lignelli3317U
10130054228174970079
122643947963630925928227767
0E6B4671E0AFCA__no
2018-07-29T02:43:00kkmrkkblmbrbkc5.large
10130054228174970079
122643947963630925928227767
0E6B4671E0AFCA__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 10000, B2 = 1000000 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 8000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
261
260
258
257
256
250
260
270
280
290
2100
Last modified: 2022-03-07T17:31:16+00:00