Prime Numbers

I am interested in prime numbers. I found a 207951 digit prime number 19540909*2^690774+1 in July, 2005. It was the 166th largest known prime when it was found.

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All of the primes I found

• 19540909*2^690774+1 (207951 digits)
• 5761455*2^551907-1 (166148 digits)
• 5761455*2^544162-1 (163816 digits)
• 5761455*2^517136-1 (155681 digits)
• 19911001*2^508852+1 (153188 digits)
• 19911001*2^457932+1 (137859 digits)
• 19911001*2^404076+1 (121647 digits)
• 19911001*2^354096+1 (106601 digits)
• 19911001*2^287272+1 (86485 digits)