is 2 2990371 - 1
has 900192 decimal digits
takes 0.255 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
Actual2679.936567.1642 %3600002984058002.04848.0883 %11.985069.8201 %
Target2641.190365.6250 %1300010000000.00821.3860 %1.198566.1015 %
Difference+3+8.7463+1.5392 %+347000+297405800+2.0402+6.7023%+10.7865+3.7186 %

Known prime factors (1 factor, 25.5 bits, 0.00085313% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
299037147845937825.5128
23
-881.497e-129.873e-72.009e-6

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-02-26USAFSSUSAFSACS360000298405800
skipped known factor: 47845937
--2.16810.490%


Trial Factoring results:
5758596061626364656667
No TF results for M2990371


ECM factoring results:
Total ECM effort:0.348 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.348


Lucas-Lehmer results:
No L-L results for M2990371


PRP results:
dateuseridcompidcofactorsres64
2017-10-26Oliver KruseGTX-1
47845937
5FC1D0CABED5E624
2017-12-10kkmrkkblmbrbkc4.xlarge
47845937
5FC1D0CABED5E624


CERT results:
No CERT results for M2990371


P-1 factor-bounds graph:
B1 = 360000, B2 = 298405800 (P-1 stage 2)
B1 = 360000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00