is 2 1790311 - 1
has 538938 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L8EF6D5195D586DFAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.597168.6567 %500000150000000.10155.0552 %16.698570.2412 %
Target2610.171665.5738 %80006500000.00341.4934 %0.175066.0879 %
Difference+6+16.4255+3.0829 %+492000+14350000+0.0981+3.5618%+16.5236+4.1533 %

Known prime factors (2 factors, 124.9 bits, 0.00697701% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
179031159019685712921902791962.3561648308190949
7 × 29 × 8119744783
2016-07-292981197447830.343234.79964.995
179031167720565078374667991962.5541891307294609
1891307294609
2008-09-02118913072946090.34328,105.715,139

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012---8.844%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.021
2022-03-09LordJuliusManual testing21261
2022-03-08LordJuliusManual testing258261
2022-03-08LordJuliusManual testing261262
2016-07-29TJAOIManual testing262263*
62.356
19
0.195


ECM factoring results:
Total ECM effort:38.491 GHz-days
Estimated T-Level:25.710
DigitsB1CompleteFacMiss
201100014.9690.000%
25500001.68518.553%
302500000.14286.766%
3510000000.01099.032%


ECM Summary

B1B2factorcurvesGHz-days
10.052
50000500000026718.40
250000400000004720.04


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15ANONYMOUSv4_computers8EF6D5195D586DFA0.097


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-0
6772056507837466799
5901968571292190279
1CF6AD8F9E0B37CF
2017-11-05ATHec2-1xh
5901968571292190279
6772056507837466799
1CF6AD8F9E0B37CF


CERT results:
No CERT results for M1790311


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
262
261
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
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Last modified: 2024-03-03T02:29:32+00:00