5449
Often a prime just less than a power of 2 is used ( the Mersenne primes 2 − 1 and 2 − 1 are popular ) , so that the reduction modulo " m " " = " 2 " − " " d " can be computed as ( " ax " " mod " 2 ) " + " " d " " .
 person: Mersenne
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Mersenne