is 2 1964119 - 1
has 591259 decimal digits
takes 0.107 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26715.128468.6567 %5760004909086002.14688.7592 %17.275171.4021 %
Target2620.312866.1290 %80004500000.00251.1549 %0.315366.5202 %
Difference+5+14.8156+2.5277 %+568000+490458600+2.1442+7.6043%+16.9598+4.8819 %

Known prime factors (2 factors, 118.2 bits, 0.00601979% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1964119529061064761771445.58813468152
23 × 3 × 561173
-85611732.827e-60.00240.0045
196411973961133068086142304072272.6471882806822501237
32 × 8125531 × 25746103
2016-05-14812553125746103651.020.71471.3008

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-08-12USAFSS6917th_Scty_Sq132000134381520
skipped known factor: 52906106476177
--0.7109.533%
2023-10-14USAFSS6917th_Scty_Sq576000490908600
skipped known factor: 52906106476177
--2.14713.128%


Trial Factoring results:
5758596061626364656667
No TF results for M1964119


ECM factoring results:
Total ECM effort:20.483 GHz-days
Estimated T-Level:24.881
DigitsB1CompleteFacMiss
201100010.3300.003%
25500000.97637.673%
302500000.06293.965%
3510000000.00399.707%


ECM Summary

B1B2factorcurvesGHz-days
10.070
500005000000271.811
50000670000070.554
50000690000070.562
50000750000020917.49


Lucas-Lehmer results:
No L-L results for M1964119


PRP results:
dateuseridcompidcofactorsres64
2017-10-05Oliver KruseGTX-1
52906106476177
7396113306808614230407
05FF0E04A04BFA34
2017-11-11ATHec2-1xh
52906106476177
7396113306808614230407
05FF0E04A04BFA34


CERT results:
No CERT results for M1964119


P-1 factor-bounds graph:
B1 = 576000, B2 = 490908600 (P-1 stage 2)
B1 = 132000, B2 = 134381520 (P-1 stage 2)
B1 = 576000 (P-1 stage 1)
B1 = 132000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=24.88 ~= 66-bit
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00