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It was in 1966 that Chen Jingrun Proved that there are Infinitely many such primes. The first few Chen primes are 2 , 3 , 5 , 7 , 11 , 13 , 17 , 19 , 23 , 29 , 31 , 37 , 41 , 47 , 53 , 59 , 67 , 71 , 83 , 89 , 101 Note that all of the Supersingular Prime s are Chen primes. Rudolf Ondrejka discovered the following 3x3 Magic Square of nine Chen primes:
In October 2005 Micha Fleuren and PrimeForm e-group found the largest known Chen prime, (1284991359 · 298305 + 1) · (96060285 · 2135170 + 1) − 2 with 70301 digits. The lower member of a pair of Twin Prime s is always a Chen prime. As of 2005 , the largest known twin prime is 16869987339975 · 2171960 ± 1; it was found in 2005 by the Hungarians Zoltán Járai, Gabor Farkas, Timea Csajbok, Janos Kasza and Antal Járai. It has 51779 digits. Terence Tao and Ben Green proved in 2005 that there are infinitely many three-term Arithmetic Progression s of Chen primes. EXTERNAL LINKS
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