31 is the third Mersenne prime (25 − 1) and the eighth Mersenne prime exponent, as well as the fourth primorial prime, and together with twenty-nine, another primorial prime, it comprises a twin prime. As a Mersenne prime, 31 is related to the perfect number 496, since 496 = 2(5 − 1)(25 − 1). 31 is also the 4th lucky prime and the 11th supersingular prime.
NEW Thirty-One Purse Townsfair Reversible MINT Bag Tote 31 shoulder bag. Beautiful tote/ large purse. Large enough to carry your iPad, but small enough to use as a purse. Charcoal Grey side has two outside pockets. Reversed to gold- great for day-to-evening wear. New in original Thirty-One packaging. Great gift for Mother’s Day!! Great to take on a cruise /vacation Great for everyday wear Shipped with USPS Priority Mail. https://i.pinimg.com/originals/8e/98/7c/8e987cf23c1871562cf9191560d7a782.jpg