她很可爱-梅森质数的夜里才出来？
目前总共只有49个已知的梅森质数。
2013年，该大学的电脑曾经计算出另外三个梅森质数。
The university's computers had previously turned up three other Mersenne primes, most recently in 2013.
梅森质数是那些可以以2n -1来表达的质数，其中的n为整数。
Mersenne primes are those that can be written in the form 2nis an integer.
梅森质数是那些可以以2n -1来表达的质数，其中的n为整数。
Mersenne primes are those that can be written in the form 2nis an integer.
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