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Henri Lifchitz


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 reflect on the primes currently on the list. (Many of the terms that are used here are explained on another page.)

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Proof-code(s): g2, L, p4, c73
E-mail address:
Web page:
Username: Lifchitz (entry created on 01/18/2000)
Database id:49 (entry last modified on 05/26/2014)
Active primes:on current list: 0.5 (unweighted total: 1), rank by number 1050
Total primes: number ever on any list: 1384 (unweighted total: 1471)
Production score: for current list 33 (normalized: 0), total 39.9006, rank by score 1055
Largest prime: 2 · 698898 - 1 ‏(‎76958 digits) via code L on 01/08/2003
Most recent: V(94823) ‏(‎19817 digits) via code c73 on 05/26/2014
Entrance Rank: mean 58035.00 (minimum 58035, maximum 58035)

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Henri Lifchitz is french electronic engineer (ENSEA). He was born in Paris in 1948, married and has two children. He is interested in computational number theory, algorithms, arithmetic functions and especially Pi(n). He has studied Fibonnacci and Lucas numbers and published a table of primes below 20*10^6 in 1971. His son Renaud (born in 1982) is also a prime hobbyist.

Surname: Lifchitz (used for alphabetizing and in codes)
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