is 2 1836047 - 1
has 552706 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
Actual26716.183668.6567%500000150000000.10155.0706%16.285170.2460%1.5893%
PrimeNet2570.010563.1579%80001500000.00122.8809%0.011764.2193%1.0614%
GPU722610.167365.5738%90001400000.00131.5957%0.168666.1231%0.5493%
Difference+6+16.0163+3.0829%+491000+14860000+0.1002+3.4749%+16.1165+4.1229%+4.1229%

Known prime factors (1 factor, 25.5 bits, 0.00138932% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
183604747737223825.50913
13
-1132.441e-121.301e-71.601e-7

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:40:11alpertronManual testing5000001500000012-
skipped known factor: 47737223
--0.101--5.071%


Trial Factoring results:
No TF results for M1836047


ECM factoring results:

Old Calculation Method

Total ECM effort:19.235 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.235 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
201100010.3430.003%
25500000.95238.602%
302500000.06094.138%
3510000000.00399.717%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.487
50000660000021516.75


Lucas-Lehmer results:
No L-L results for M1836047


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T02:57:29Oliver KruseGTX-3
47737223
EEFAD3D299D0B1__no
2017-11-06T14:28:02kkmrkkblmbrbkold
47737223
EEFAD3D299D0B1__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (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
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2021-04-30T08:11:27+00:00