. "Belphegor's prime is the name for the number 1000000000000066600000000000001 = \\(10^{30} + 666 \\cdot 10^{14} + 1\\). It is a palindromic prime, notable for its curious decimal expansion containing the beast number. Clifford Pickover named the number after a demon from the Judeo-Christian mythos, playing on 666's association with the devil in numerology."@en . "Belphegor's prime"@en . . . . . . "Belphegor's prime is the name for the number 1000000000000066600000000000001 = \\(10^{30} + 666 \\cdot 10^{14} + 1\\). It is a palindromic prime, notable for its curious decimal expansion containing the beast number. Clifford Pickover named the number after a demon from the Judeo-Christian mythos, playing on 666's association with the devil in numerology. Using exponents to represent digit repetition, the number could be written \\(10^{13}6660^{13}1\\). (The presence of the number 13 \u2014 associated with bad luck in Western culture \u2014 further ties into the numerological theme.) Harvey Dubner calculated that the first few numbers of the form \\(10^n6660^n1\\) have \\(n = 0,\\,13,\\,42,\\,506,\\,608,\\,2472,\\,2623\\)."@en . .