is 2 1722937 - 1
has 518656 decimal digits
takes 0.081 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L69F633D8B278BC0Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26717.246168.6567 %500000150000000.08805.0319 %17.334170.2339 %
Target2610.178365.5738 %70005500000.00251.3442 %0.180866.0365 %
Difference+6+17.0678+3.0829 %+493000+14450000+0.0855+3.6877%+17.1533+4.1974 %

Known prime factors (1 factor, 60.9 bits, 0.00353224% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
172293720901304436730358091960.858606560322192
24 × 3 × 11 × 461 × 2491949
2008-07-1946124919490.08910.00930.0173

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012
skipped known factor: 2090130443673035809
---8.807%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-11-21ANONYMOUSv4_computers212570.011
2003-02-02ANONYMOUSv4_computers212580.022


ECM factoring results:
Total ECM effort:35.422 GHz-days
Estimated T-Level:25.713
DigitsB1CompleteFacMiss
201100014.6690.000%
25500001.67018.833%
302500000.14386.716%
3510000000.01099.016%


ECM Summary

B1B2factorcurvesGHz-days
10.155
50000500000025417.24
250000400000004918.03


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13ANONYMOUSv4_computers69F633D8B278BC0E0.081


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
2090130443673035809
D67DD200B3212B88
2017-10-19Oliver KruseThreadripper-PC
2090130443673035809
D67DD200B3212B88


CERT results:
No CERT results for M1722937


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
258
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
250
260
270
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Last modified: 2024-03-03T02:29:32+00:00