Harvey Dubner


A titan, as defined by Samuel Yates, is anyone who has found a titanic prime. This page provides data on those that have found these primes. The data below only reflects on the primes currently on the list. (Many of the terms that are used here are explained on another page.)

Proof-code(s): D, CD, DB, DK, WD, gd, c12, c19, x30, p138, x39, c70, c74
E-mail address: harvey@dubner.com
Username: Dubner (entry created on 01/18/00)
Database id:5 (entry last modified on 05/01/20)
Active primes:on current list: 25.8333 (unweighted total: 40), rank by number 33
Total primes: number ever on any list: 4523.83 (unweighted total: 4586)
Production score: for current list 35 (normalized: 0), total 43.9520, rank by score 1055
Largest prime: 10205030 + 7047407 · 10102512 + 1 ‏(‎205031 digits) via code D on 11/27/11
Most recent: primV(112914) ‏(‎14446 digits) via code c74 on 11/23/16
Entrance Rank: mean 24920.97 (minimum 7, maximum 68017)

Descriptive Data: (report abuse)

Harvey Dubner is an electrical engineer and an amateur number theorist.  He found all of his early primes using the Dubner Crunchers that he and his son designed and sold.  In the early days of PC's, these coprocessors (which fit in IBM compatibles) were used to find an impressive number of record primes.

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Surname: Dubner (used for alphabetizing and in codes)
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