is 2 1729187 - 1
has 520538 decimal digits
takes 0.094 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
Actual26717.183868.6567%500000150000000.10155.0341%17.285270.2346%1.5778%
PrimeNet2570.011163.1579%80001400000.00122.7961%0.012364.1880%1.0302%
GPU722610.177665.5738%70001100000.00101.3452%0.178666.0369%0.4631%
Difference+6+17.0061+3.0829%+493000+14890000+0.1005+3.6889%+17.1066+4.1977%+4.1977%

Known prime factors (3 factors, 189.4 bits, 0.01095492% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1729187968344721929.851280
23 × 5 × 7
-884.387e-116.293e-71.281e-6
17291872107976272893698022504892477.48060952814036125012
22 × 71 × 450227 × 476698609
2020-05-1845022747669860918,5902.07653.8158
172918751822870302947413546746412582.1001498475014644090360
23 × 3 × 5 × 23 × 12901571 × 42082141
2019-06-111290157142082141919,5321.13992.0654

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
172918720412476958498678742607494281856933107.331
1729187501824028849267986485957728492016134111.951
1729187109241380991860596130584288325181910778217814944949159.580
172918710578331459821795223096432224523183466678022289004
88208729
58189.431
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:32:48alpertronManual testing5000001500000012-
skipped known factor: 968344721
--0.101--5.034%


Trial Factoring results:
No TF results for M1729187


ECM factoring results:

Old Calculation Method

Total ECM effort:17.847 GHz-days
Estimated T-Level:24.643
DigitsB1CurvesCompleteFacMiss
2011000260 / 1002.6007.331%
2550000260 / 2800.92939.446%

New Calculation Method

Total ECM effort:17.847 GHz-days
Estimated T-Level:24.643
DigitsB1CompleteFacMiss
20110008.3870.023%
25500000.75846.859%
302500000.04795.439%
3510000000.00299.786%


ECM Summary

B1B2factorcurvesGHz-days
50000500000019313.25
500005000000654.462
50000500000020.137


Lucas-Lehmer results:
No L-L results for M1729187


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:50alpertronManual testing
968344721
A955514C80FDBA__no
2017-10-19T07:12:40Oliver KruseThreadripper
968344721
A955514C80FDBA__no
2019-06-12T15:14:52Niels_Mache_NextcloudSuperDry-X
968344721
5182287030294741354674641
D5EE0D86F4ECC7C7no
2019-06-13T12:59:59kkmrkkblmbrbkc5.large
968344721
5182287030294741354674641
D5EE0D86F4ECC7C7no
2020-05-18T23:54:03CrypticCluecruncher
968344721
210797627289369802250489
5182287030294741354674641
D5EE0D86F4ECC7C7no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2020-05-18T23:54:03+00:00