<Dd> (3, 7), (7, 11), (13, 17), (19, 23), (37, 41), (43, 47), (67, 71), (79, 83), (97, 101), (103, 107), (109, 113), (127, 131), (163, 167), (193, 197), (223, 227), (229, 233), (277, 281), (307, 311), (313, 317), (349, 353), (379, 383), (397, 401), (439, 443), (457, 461), (463,467), (487, 491), (499, 503), (613, 617), (643, 647), (673, 677), (739, 743), (757, 761), (769, 773), (823, 827), (853, 857), (859, 863), (877, 881), (883, 887), (907, 911), (937, 941), (967, 971) </Dd> <P> The only prime belonging to two pairs of cousin primes is 7 . One of the numbers n, n + 4, n + 8 will always be divisible by 3, so n = 3 is the only case where all three are primes . </P> <P> As of May 2009 the largest known cousin prime was (p, p + 4) for </P> <Dl> <Dd> p = (311778476 587502 9001 #(587502 9001 #+ 1) + 210) (587502 9001 #− 1) / 35 + 1 </Dd> </Dl>

What is the first pair of primes that differ by 1