Cousin Prime
In mathematics, cousin primes are prime numbers that differ by four; compare this with twin primes, pairs of prime numbers that differ by two, and sexy primes, pairs of prime numbers that differ by six.
The cousin primes (sequences A023200 and A046132 in OEIS) below 1000 are:
- (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)
Read more about Cousin Prime: Properties
Famous quotes containing the words cousin and/or prime:
“I against my brother
I and my brother against our cousin
I, my brother and our cousin against the neighbors
All of us against the foreigner.”
—Bedouin Proverb. Quoted by Bruce Chatwin in “From the Notebooks,” ch. 30, The Songlines (1987)
“Ye elms that wave on Malvern Hill
In prime of morn and May,
Recall ye how McClellan’s men
Here stood at bay?”
—Herman Melville (1819–1891)