is 2 1848551 - 1
has 556470 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
Actual26716.074268.6567%5001005001000.03931.9981%16.113569.2830%0.6263%
PrimeNet2570.010463.1579%90001600000.00143.0227%0.011764.2715%1.1136%
GPU722610.166265.5738%90001500000.00131.6307%0.167566.1352%0.5614%
Difference+6+15.9080+3.0829%+491100+350100+0.0380+0.3674%+15.9460+3.1478%+3.1478%

Known prime factors (2 factors, 99.0 bits, 0.00535363% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
18485513697103721.8181
1
-111.512e-137.866e-81.601e-7
18485511672707814251179270217832477.14745243756170405341
131 × 6703 × 51525016337
2021-03-2167035152501633717,422220.82412.44

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
18485516184173078191477633460149946493098.964
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-12T11:55:40Lisander ViaeneDesktop500100500100-
skipped known factor: 3697103
--0.039--1.998%


Trial Factoring results:
No TF results for M1848551


ECM factoring results:

Old Calculation Method

Total ECM effort:19.867 GHz-days
Estimated T-Level:24.625
DigitsB1CurvesCompleteFacMiss
2011000259 / 1002.5907.405%
2550000259 / 2800.92539.588%

New Calculation Method

Total ECM effort:19.867 GHz-days
Estimated T-Level:24.625
DigitsB1CompleteFacMiss
20110008.8490.014%
25500000.80244.860%
302500000.05095.162%
3510000000.00299.772%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.489
50000500000010.069
50000660000022217.31


Lucas-Lehmer results:
No L-L results for M1848551


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T05:44:10Oliver KruseGTX-1
3697103
13C6AEAB496E7F__no
2017-11-06T21:30:12kkmrkkblmbrbkc4.xlarge
3697103
13C6AEAB496E7F__no
2021-03-22T06:55:24Luigi Morelli9800
3697103
167270781425117927021783
0205E3C96BD54596no


P-1 factor-bounds graph:
B1 = 500100 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2022-04-12T11:55:40+00:00