is 2 1837349 - 1
has 553098 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
Actual26716.172268.6567%500000150000000.10155.0710%16.273670.2461%1.5894%
PrimeNet2570.010463.1579%80001500000.00122.8813%0.011764.2194%1.0615%
GPU722610.167265.5738%90001400000.00131.5959%0.168566.1232%0.5494%
Difference+6+16.0050+3.0829%+491000+14860000+0.1002+3.4751%+16.1052+4.1230%+4.1230%

Known prime factors (2 factors, 121.9 bits, 0.00663519% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
18373493709391264781771548.398100944112
24 × 19 × 332053
-193320532.806e-50.00140.0027
1837349134824290789132040991272373.5133668989690829887
191 × 19209370109057
2020-06-23191192093701090571,813.482,327153,763

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1837349500116046533603644805726593951025147937121.912
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:40:19alpertronManual testing5000001500000012-
skipped known factor: 370939126478177
--0.101--5.071%


Trial Factoring results:
No TF results for M1837349


ECM factoring results:

Old Calculation Method

Total ECM effort:19.228 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.228 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.5730.019%
25500000.77745.996%
302500000.04895.309%
3510000000.00299.779%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.488
50000500000010.069
50000660000021416.67


Lucas-Lehmer results:
No L-L results for M1837349


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T03:14:54Oliver KruseGTX-0
370939126478177
BC9F8631DD1974__no
2017-11-06T11:37:26kkmrkkblmbrbkc4.xlarge
370939126478177
BC9F8631DD1974__no
2020-06-23T11:51:08CrypticClueManual testing
370939126478177
13482429078913204099127
AC21B7FFF0E87201no
2020-07-03T15:35:04oodairacom2
370939126478177
13482429078913204099127
AC21B7FFF0E87201no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-05-14T12:09:09+00:00