PrimeGrid's annual Tour de Primes is underway! Unlike other challenges, there's no trophy for participation. This challenge is all about finding prime numbers. As with last year, there will also be a red jersey -- which will be awarded to whomever finds the largest prime number during the month of February. And, of course, we'll be awarding the green, yellow, and polk-a-dot jerseys as in previous years. For more information, please see Tour de Primes 2017. Good luck everyone!

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