The 20 Largest Known Lehmer number
http://primes.utm.edu/top20/page.php?id=47
The Prime Pages keeps a list of the 5000 largest known primes, plus a few each of certain selected archivable forms and classes. These forms are defined in this collection's home page.en-usCopyright 2006, The Prime Pagescaldwell@utm.edu (Dr. Chris K. Caldwell)600U(16531,1,6721)-U(16531,1,6720)
http://primes.utm.edu/primes/page.php?id=80508
Tue, 15 May 2007 08:53:21 -0500This prime has 28347 digits, was found by x36 on 15 May 2007. It has rank 1 on the list of Lehmer number, and rank 62269 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=80508U(5092,1,7561)+U(5092,1,7560)
http://primes.utm.edu/primes/page.php?id=118608
Tue, 07 Oct 2014 03:14:39 -0500This prime has 28025 digits, was found by x25 on 07 Oct 2014. It has rank 2 on the list of Lehmer number, and rank 62328 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=118608U(5239,1,7350)-U(5239,1,7349)
http://primes.utm.edu/primes/page.php?id=123606
Wed, 28 Jun 2017 15:26:24 -0500This prime has 27333 digits, was found by CH10 on 28 Jun 2017. It has rank 3 on the list of Lehmer number, and rank 62455 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=123606U(1766,1,7561)-U(1766,1,7560)
http://primes.utm.edu/primes/page.php?id=116312
Thu, 14 Nov 2013 18:17:37 -0600This prime has 24548 digits, was found by x25 on 14 Nov 2013. It has rank 4 on the list of Lehmer number, and rank 63510 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=116312U(1383,1,7561)+U(1383,1,7560)
http://primes.utm.edu/primes/page.php?id=116219
Wed, 06 Nov 2013 05:31:14 -0600This prime has 23745 digits, was found by x25 on 06 Nov 2013. It has rank 5 on the list of Lehmer number, and rank 64326 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=116219U(1118,1,7561)-U(1118,1,7560)
http://primes.utm.edu/primes/page.php?id=116154
Thu, 31 Oct 2013 04:32:20 -0500This prime has 23047 digits, was found by x25 on 31 Oct 2013. It has rank 6 on the list of Lehmer number, and rank 64470 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=116154U(43100,1,4620)+U(43100,1,4619)
http://primes.utm.edu/primes/page.php?id=121733
Thu, 02 Jun 2016 20:12:46 -0500This prime has 21407 digits, was found by x25 on 02 Jun 2016. It has rank 7 on the list of Lehmer number, and rank 64845 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=121733U(15631,1,5040)-U(15631,1,5039)
http://primes.utm.edu/primes/page.php?id=64489
Wed, 23 Apr 2003 07:08:03 -0500This prime has 21134 digits, was found by x25 on 23 Apr 2003. It has rank 8 on the list of Lehmer number, and rank 64943 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=64489U(35759,1,4620)+U(35759,1,4619)
http://primes.utm.edu/primes/page.php?id=121715
Mon, 30 May 2016 19:56:02 -0500This prime has 21033 digits, was found by x25 on 30 May 2016. It has rank 9 on the list of Lehmer number, and rank 64988 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=121715U(31321,1,4620)-U(31321,1,4619)
http://primes.utm.edu/primes/page.php?id=121731
Thu, 02 Jun 2016 12:47:02 -0500This prime has 20767 digits, was found by x25 on 02 Jun 2016. It has rank 10 on the list of Lehmer number, and rank 65047 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=121731U(22098,1,4620)+U(22098,1,4619)
http://primes.utm.edu/primes/page.php?id=121740
Sat, 04 Jun 2016 19:25:49 -0500This prime has 20067 digits, was found by x25 on 04 Jun 2016. It has rank 11 on the list of Lehmer number, and rank 65262 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=121740U(21412,1,4620)-U(21412,1,4619)
http://primes.utm.edu/primes/page.php?id=121751
Wed, 08 Jun 2016 19:49:28 -0500This prime has 20004 digits, was found by x25 on 08 Jun 2016. It has rank 12 on the list of Lehmer number, and rank 65320 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=121751U(19361,1,4620)+U(19361,1,4619)
http://primes.utm.edu/primes/page.php?id=121700
Thu, 26 May 2016 18:42:03 -0500This prime has 19802 digits, was found by x25 on 26 May 2016. It has rank 13 on the list of Lehmer number, and rank 65396 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=121700U(9657,1,4321)-U(9657,1,4320)
http://primes.utm.edu/primes/page.php?id=76372
Sun, 04 Dec 2005 23:48:46 -0600This prime has 17215 digits, was found by x23 on 04 Dec 2005. It has rank 14 on the list of Lehmer number, and rank 67725 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=76372U(15823,1,3960)-U(15823,1,3959)
http://primes.utm.edu/primes/page.php?id=60799
Wed, 20 Nov 2002 18:19:00 -0600This prime has 16625 digits, was found by x25 on 20 Nov 2002. It has rank 15 on the list of Lehmer number, and rank 67985 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=60799U(10803,1,4081)-U(10803,1,4080)
http://primes.utm.edu/primes/page.php?id=76387
Tue, 06 Dec 2005 08:02:15 -0600This prime has 16457 digits, was found by x25 on 06 Dec 2005. It has rank 16 on the list of Lehmer number, and rank 68052 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=76387U(2878,1,4620)-U(2878,1,4619)
http://primes.utm.edu/primes/page.php?id=110674
Wed, 09 Jan 2013 11:22:54 -0600This prime has 15978 digits, was found by x25 on 09 Jan 2013. It has rank 17 on the list of Lehmer number, and rank 68260 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=110674U(10853,1,3960)+U(10853,1,3959)
http://primes.utm.edu/primes/page.php?id=60896
Fri, 06 Dec 2002 02:34:58 -0600This prime has 15977 digits, was found by x25 on 06 Dec 2002. It has rank 18 on the list of Lehmer number, and rank 68261 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=60896U(9667,1,3960)-U(9667,1,3959)
http://primes.utm.edu/primes/page.php?id=59883
Fri, 15 Nov 2002 19:00:49 -0600This prime has 15778 digits, was found by x25 on 15 Nov 2002. It has rank 19 on the list of Lehmer number, and rank 68455 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=59883U(13283,1,3697)+U(13283,1,3696)
http://primes.utm.edu/primes/page.php?id=99848
Mon, 25 Apr 2011 16:44:14 -0500This prime has 15240 digits, was found by x25 on 25 Apr 2011. It has rank 20 on the list of Lehmer number, and rank 68673 on the list of largest known primes.http://primes.utm.edu/primes/page.php?id=99848