is 2 4845037 - 1
has 1458502 decimal digits
takes 0.672 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LEA23068742275619double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2676.132965.6716 %3200002243412602.51748.0940 %8.650368.4502 %
Target2651.505864.6154 %3200032500000.04172.3259 %1.547565.4384 %
Difference+2+4.6270+1.0563 %+288000+221091260+2.4757+5.7682%+7.1028+3.0118 %

Known prime factors (1 factor, 85.4 bits, 0.00176230% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4845037504852390932110698333299832685.3845209995206766333243
3 × 13 × 1583 × 84390158361539
2010-03-301583843901583615391,617,270924,0961,725,953

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-09-05Carsten Kossendeymother30000435000--0.0102.062%
2023-04-13Kevin_9611Factor_2320000224341260--2.8689.653%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-06-01ANONYMOUSv4_computers212610.032


ECM factoring results:
Total ECM effort:0.132 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.132


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-21ANONYMOUSv4_computersEA230687422756190.672
2000-08-17ANONYMOUSv4_computersEA230687422756190.672


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
50485239093211069833329983
65A7D4EBA1DA23B0
2018-03-30krackerGRID-11
50485239093211069833329983
65A7D4EBA1DA23B0


CERT results:
No CERT results for M4845037


P-1 factor-bounds graph:
B1 = 320000, B2 = 224341260 (P-1 stage 2)
B1 = 320000 (P-1 stage 1)
B1 = 30000, B2 = 435000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
261
this exponent TF target: 65
TF double-checked to: 67
250
260
270
280
290
JSON version of this page
Last modified: 2024-02-09T03:30:02+00:00