is 2 1749959 - 1
has 526791 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.979868.6567%500000150000000.10155.0413%17.081370.2368%1.5801%
PrimeNet2570.011063.1579%80001400000.00122.8025%0.012264.1904%1.0325%
GPU722610.175565.5738%80001100000.00111.4127%0.176666.0601%0.4863%
Difference+6+16.8042+3.0829%+492000+14890000+0.1004+3.6287%+16.9047+4.1767%+4.1767%

Known prime factors (2 factors, 116.3 bits, 0.00664612% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17499591949629321911237.50455705
5 × 13 × 857
-138571.106e-84.640e-66.871e-6
17499595262200132116733998827372478.800150352097738196552
23 × 3 × 11 × 569515521735593
2020-07-031156951552173559360,9682,440,8014,558,737

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
174995910259339675333460519097648108248676736116.304
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:35:33alpertronManual testing5000001500000012-
skipped known factor: 194962932191
--0.101--5.041%


Trial Factoring results:
No TF results for M1749959


ECM factoring results:

Old Calculation Method

Total ECM effort:17.938 GHz-days
Estimated T-Level:24.661
DigitsB1CurvesCompleteFacMiss
2011000261 / 1002.6107.257%
2550000261 / 2800.93239.305%

New Calculation Method

Total ECM effort:17.938 GHz-days
Estimated T-Level:24.661
DigitsB1CompleteFacMiss
20110008.4190.022%
25500000.76146.723%
302500000.04795.422%
3510000000.00299.786%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026017.87
50000500000010.069


Lucas-Lehmer results:
No L-L results for M1749959


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T06:23:00Oliver KruseGTX-2
194962932191
B33C1C6D4F6EA4__no
2017-11-03T22:06:24kkmrkkblmbrbkold
194962932191
B33C1C6D4F6EA4__no
2020-07-03T07:36:46CrypticClueManual testing
194962932191
526220013211673399882737
D2033848192CA92Dno
2020-07-04T02:44:43marssystemssystem03
194962932191
526220013211673399882737
D2033848192CA92Dno


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:
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Last modified: 2020-08-14T09:32:19+00:00