is 2 1732811 - 1
has 521629 decimal digits
takes 0.094 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L687C471D9D509276double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.147868.6567%500000150000000.10155.0353%17.249370.2350%1.5782%
PrimeNet2570.011163.1579%80001400000.00122.7972%0.012364.1885%1.0306%
GPU722610.177365.5738%70001100000.00101.3458%0.178366.0371%0.4633%
Difference+6+16.9705+3.0829%+493000+14890000+0.1005+3.6895%+17.0710+4.1979%+4.1979%

Known prime factors (1 factor, 56.6 bits, 0.00326848% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17328111120197002685159291856.63732323115524
22 × 7 × 22369 × 51607
1998-11-2122369516070.00750.00190.0036

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:33:18alpertronManual testing5000001500000012-
skipped known factor: 112019700268515929
--0.101--5.035%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers??56.637180.0020.1910.004


ECM factoring results:

Old Calculation Method

Total ECM effort:17.645 GHz-days
Estimated T-Level:24.589
DigitsB1CurvesCompleteFacMiss
2011000257 / 1002.5707.555%
2550000257 / 2800.91839.872%

New Calculation Method

Total ECM effort:17.645 GHz-days
Estimated T-Level:24.589
DigitsB1CompleteFacMiss
20110008.2900.025%
25500000.74947.271%
302500000.04695.491%
3510000000.00299.789%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025717.64


Lucas-Lehmer results:
No L-L results for M1732811


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:16:21alpertronManual testing
112019700268515929
954D03ED94E40C__no
2017-10-19T09:15:18Oliver KruseGTX-3
112019700268515929
954D03ED94E40C__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
2
250
260
270
280
290
2100
Last modified: 2020-05-25T09:38:33+00:00