is 2 1843999 - 1
has 555100 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.113868.6567 %10000001883290500.88158.2214 %16.995471.2336 %
Target2610.166665.5738 %90007500000.00391.6299 %0.170566.1349 %
Difference+6+15.9473+3.0829 %+991000+187579050+0.8776+6.5915%+16.8249+5.0987 %

Known prime factors (1 factor, 28.1 bits, 0.00152583% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1843999295039841928.13680
24 × 5
-16161.973e-111.259e-62.561e-6

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-04-05JossManual testing1000000188329050
skipped known factor: 295039841
--1.06813.265%


Trial Factoring results:
5758596061626364656667
No TF results for M1843999


ECM factoring results:
Total ECM effort:39.375 GHz-days
Estimated T-Level:25.712
DigitsB1CompleteFacMiss
201100015.0430.000%
25500001.68618.521%
302500000.14286.725%
3510000000.01099.028%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.489
50000660000021516.76
250000400000004720.13


Lucas-Lehmer results:
No L-L results for M1843999


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-3
295039841
B1749DB08695D245
2017-11-06kkmrkkblmbrbkold
295039841
B1749DB08695D245


CERT results:
No CERT results for M1843999


P-1 factor-bounds graph:
B1 = 1000000, B2 = 188329050 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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109
TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00