is 2 1841447 - 1
has 554331 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
Actual26716.136268.6567%10000001883290500.88158.2202%17.017771.2332%2.5765%
PrimeNet2570.010463.1579%80001500000.00122.8825%0.011764.2199%1.0620%
GPU722610.166865.5738%90001400000.00131.5966%0.168166.1234%0.5497%
Difference+6+15.9694+3.0829%+991000+188189050+0.8802+6.6236%+16.8496+5.1098%+5.1098%

Known prime factors (2 factors, 111.9 bits, 0.00607573% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
184144729757783531031.471808
23 × 101
-81011.825e-101.028e-61.281e-6
184144716070663143447007498332632580.411436359643895453073
3 × 883 × 43891 × 3753074147
2020-06-17438913753074147158,10216.08830.042

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1841447478227315006245387161669239475583934111.881
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-03T12:49:00Jocelyn LaroucheManual testing1000000188329050-
skipped known factor: 2975778353
--0.882--8.220%


Trial Factoring results:
No TF results for M1841447


ECM factoring results:

Old Calculation Method

Total ECM effort:18.696 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.696 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.4370.022%
25500000.76446.587%
302500000.04795.390%
3510000000.00299.783%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.415
500005000000926.359
50000660000015311.92


Lucas-Lehmer results:
No L-L results for M1841447


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T04:06:13Oliver KruseGTX-2
2975778353
6DE34F4D5A5EDF__no
2017-11-06T13:40:51kkmrkkblmbrbkc4.xlarge
2975778353
6DE34F4D5A5EDF__no
2020-06-18T11:46:06mnd9mnd
2975778353
1607066314344700749833263
ED42457AD4C75200no
2020-06-20T01:08:36AbsolutXTR750D
2975778353
1607066314344700749833263
ED42457AD4C75200no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 188329050 (P-1 stage 2)
B1 = 1000000 (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
230
240
250
260
270
280
290
2100
Last modified: 2022-04-03T12:49:00+00:00