[math-fun] a remarkable prime number to bring in the new year

This 350 digit prime number (broken into groups of 7 digits): 3756421 7246513 3261547 7452163 3612547 7152643 7126543 7324651 7432651 7561423 1246537 7562431 1564237 3546271 7451623 3456127 3462751 3156427 1265347 3456217 7256341 1476253 1726453 7642513 1342657 7356421 1672453 3152467 3241657 7624531 1354267 7362541 1246573 1562347 7435621 1572643 1452637 7542163 3612457 3526741 7164253 1674523 3542761 3462517 1436527 7216543 3254761 3524617 3456721 1276543 is reversible, i.e. it is prime whether you read it front to back or back to front. In addition each of the groups of 7 digits is a reversible prime 7-digits long, which is a different permutation of 1,2,3,4,5,6,7.