ElevenSmooth
Searching for factors of the Mersenne number

M(3326400) = 23326400-1
ECM Progress

Completed factorizations of Mersenne numbers are at the bottom of this page.

Now In the ECM Server

MersenneComposite
Size		20 Digits
B1=11K
40 Curves		25 Digits
B1=50K
100 Curves		30 digits
B1=250K
200 Curves		35 digits
B1=1M
500 Curves		40 digits
B1=3M
1200 Curves		45 Digits
B1=11M
2300 Curves		50 digits
B1=43M
3800 Curves		55 digits
B1=110M
9000 Curves
M(3360)C197 done done done done done done done 2694
M(3168)C222 done done done done done done done 2020
M(3080)C240 done done done done done done done 2020
M(3024)C256 done done done done done done done 2021
M(4158M)C262 done done done done done done done 2020
M(2464)C271 done done done done done done done 2020
M(5040)C278 done done done done done done done 2020
M(5280)C280 done done done done done done done 2020
M(4320)C281 done done done done done done done 2020
M(2079)C307 done done done done done done done
M(4158)C313 done done done done done done done
M(3465)C365 done done done done done done done
M(6930)C388 done done done done done done done
M(13860)C429 done done done done done done done
M(5544)C434 done done done done done done done
M(4752)C434 done done done done done done done
M(6048)C490 done done done done done done done
M(7392)C530 done done done done done done done
M(9240)C532 done done done done done done done
M(6336)C534 done done done done done done done
M(7920)C552 done done done done done done done
M(8640)C648 done done done done done done done
M(10080)C690 done done done done done done done
M(9504)C714 done done done done done done done
M(10560)C744 done done done done done done done
M(11880)C818 done done done done done done done
M(11088)C839 done done done done done done done
M(12096)C996 done done done done done done done
M(15120)C1026 done done done done done done
M(18480)C1091 done done done done done done
M(12320)C1099 done done done done done done
M(15840)C1122 done done done done done done
M(14784)C1127 done done done done done done
M(20790L)C1223 done done done done done done
M(20790)C1234 done done done done done done
M(10395)C1255 done done done done done done
M(20790M)C1301 done done done done done done
M(16632)C1301 done done done done done done
M(20160)C1357 done done done done done done
M(23760)C1695 done done done done done
M(19008)C1700 done done done done done 1
M(27720)C1726 done done done done done
M(30240)C2026 done done done done done
M(31680)C2267 done done done done done 426
M(24640)C2304 done done done done done
M(33264)C2553 done done done done done
M(47520)C3386 done done done 286
M(55440)C3442 done done done 268
M(44352)C3456 done done done 261
M(60480)C4157 done done done 162
M(73920)C4605 done done done 92
M(66528)C5159 done done done 92
M(83160)C5202 done done done 95
M(95040)C6909 done done done 51
M(110880)C6936 done done done 47
updated July 11, 2009

These curve counts advance after completing half the number of curves expected to be needed for a factor of each size. Consequently, when a level is newly "done" we hae finished running ECM curves at that level, but are not yet really confident no factors exist at that level. Any such missed factors are expected to show up during the next level's search.

Completed Factorizations

Mersenne
Number		 Penultimate
Factor		 Ultimate
Cofactor		 Date
M(6160) P50 P481 2009-04-12
M(7560) P49 P457 2009-03-30
M(6720) P51 P393 2009-03-26
M(2800) P36 P246 2008-08-11
M(6300M) P39 P179 2008-06-11
M(2376) P57 P138 2008-05-07
M(1575) P69 P80 2008-03-08
M(4032) P46 P263 2006-11-20
M(1925) P32 P248 2007-11-19
M(1485) P61 P75 2005-11-14
M(3960) P47 P151 2004-07-20
M(5940) P40 P147 2004-01-25
M(15400) P1455 was PRP 2003-11-18
M(26400) P24 P1886 2003-09-24
M(3520) P39 P347 2003-09-06
M(2520) P51 P61 2003-06-16
M(4928) P19 P556 2003-06-09
M(36960) P2312 entire primitive 2003-05-29