is 2 1848281 - 1
has 556389 decimal digits
takes 0.100 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
Actual26716.076568.6567%500000283586457012.191010.3827%28.267571.9110%3.2543%
PrimeNet2570.010463.1579%90001600000.00143.0226%0.011764.2715%1.1136%
GPU722610.166265.5738%90001500000.00131.6306%0.167566.1351%0.5614%
Difference+6+15.9103+3.0829%+491000+2835714570+12.1897+8.7521%+28.1000+5.7759%+5.7759%

Known prime factors (2 factors, 91.0 bits, 0.00492310% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
184828114786249823.8184
22
-446.051e-133.146e-76.404e-7
18482811666004692421152554072167.17545069031506063
3 × 79 × 653 × 291216983
2020-07-0665329121698327.2191.24812.3311

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
184828124633960217307574531464983432890.993
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-11T18:11:50Lisander ViaeneDesktop5000002835864570-
skipped known factor: 14786249
skipped known factor: 166600469242115255407
--12.19--10.383%


Trial Factoring results:
No TF results for M1848281


ECM factoring results:

Old Calculation Method

Total ECM effort:19.261 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.261 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.5770.019%
25500000.77745.976%
302500000.04895.307%
3510000000.00299.779%


ECM Summary

B1B2factorcurvesGHz-days
500005000000332.282
50000500000020.138
50000660000021616.84


Lucas-Lehmer results:
No L-L results for M1848281


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T05:45:09Oliver KruseGTX-3
14786249
7B26336DEFB856__no
2017-11-06T21:21:12kkmrkkblmbrbkc4.xlarge
14786249
7B26336DEFB856__no
2020-07-07T18:55:55mnd950871
14786249
166600469242115255407
8F2340C0DACD016Fno
2020-07-07T20:28:14atrenchDesktop
14786249
166600469242115255407
8F2340C0DACD016Fno
2020-07-09T19:25:43nordisweet16
14786249
166600469242115255407
8F2340C0DACD016Fno


P-1 factor-bounds graph:
B1 = 500000, B2 = 2835864570 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2022-04-11T18:11:50+00:00