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We will be updating our hardware on Thursday September 4 at about 9am CDT (2pm GMT).
Submissions will be turned off about one hour before that time. Downtime should be brief. Chris K. Caldwell <caldwell@utm.edu>
(79) is palindromic and there is symmetry around the 79th digit of (which is 8): 628 620 8 998 628. There were 79 unprovoked shark attacks reported around the world in the year 2000, the largest number since the International Shark Attack File began compiling statistics in 1958. [Minon] 79 is the smallest prime whose sum of digits is a fourth power. [Murthy] 2^{79} is the smallest power of 2 which is greater than Avogadro's number (6.0221367*10^23). [Wu] An Army Air Corps bomber crashed into floor 79 of the Empire State Building on July 28, 1945. 79 = 2^{7}  7^{2}. [La Haye] For any 3217644767340672907899084554130 consecutive integers, 400440702414394285778534400000 will have 79 as a lowest prime factor. [Schuler] The smallest prime p such that when multiplied with p1 (78 * 79 = 6162) the result is a neartautonymic number, i.e., in this case a concatenation of two successive numbers 61 and 62 in ascending order. Note that the first halve 61 is prime as well. [De Geest] The smallest emirp p whose the sum plus the product of digits is equal p. [Loungrides] On page 79 of the novel Contact by Carl Sagan, it says that no astrophysical process is likely to generate prime numbers. Illinois has stated that one may not ride in the left hand lane for more than a half mile ... potential fine of $79. [Patterson] The square root of 79 starts with four 8's. [Axoy] The following poetic quotation contains 79 letters: "When One made love to Zero, spheres embraced their arches and prime numbers caught their breath." Raymond Queneau (French author of the mid20th century). [Post] Each of the numbers 1 to 79 gives a larger number when you write out its English name and add the letters using a=1, b=2, c=3, ... (but 80 gives 74). [Hartley] U.S. President James A. Garfield died 79 days after being shot. [Dowdy] 79 appears in Skewes' number, i.e., e^{ee79}. A number below which John E. Littlewood proved that (n) becomes greater than or equal to li(n) if we assume the Riemann hypothesis is true. There were 79 broadcasted episodes of the original Star Trek. [McCranie] Ten to the power 79 has been called the "Universe number" because it is considered a reasonable lower limit estimate for the number of atoms in the observable universe. An emirp and sum of three reversible primes: 79 = 11 + 31 + 37. Curiously, the sum holds for the reversals: 97 = 11 + 13 + 73. [Silva] The composite volcano Mt. Vesuvius erupted in A.D. 79, burying Pompeii, Herculaneum, and Stabiae under ashes and mud. The smallest Kynea emirp. [Loungrides] In Jules Verne's novel "Around the World in Eighty Days," character Phileas Fogg actually succeeds his world tour trip in 79 days and wins his bet. [Beedassy] There are 79 connected graphs with 7 edges. [Post] The number of multidigit narcissistic numbers in base ten. It ends with the number of singledigit narcissistic numbers in base ten. [Capelle] The smallest prime which is arithmetic average of the two previous and two next primes. [Silva] The number of letters in the oftcited rhetorical remark of Fields medalist Enrico Bombieri: "The failure of the Riemann hypothesis would create havoc in the distribution of prime numbers." [Beedassy] 2^{79} = 604462909807314587353088 is the smallest pandigital number of the form 2 to the power of prime. [Poo Sung] The smallest (and only known) integer congruent to 7 mod 8 which is not expressible as the sum of a square and twice a prime, i.e., as x^2 + 2*p. [Oakes] The largest known natural number that cannot be expressed as a sum of products of two successive primes. [Capelle] Subtract 79 from 7!+9! and you will have another emirp. [Silva] The largest 2digit integer N such that N, 4*N and 5*N are all reversals of primes. [Post] The smallest emirp equidistant between two consecutive Mersenne primes (31, 127). [Beedassy] The smallest emirp whose reversal is the next emirp after it. [Silva] Choose two 2digit numbers of the form n and n+2 from different decades (for our purpose two 2digit numbers are from different decades if their leftmost digits are not equal). Now reverse the digits of these two numbers and subtract the smaller from the larger. The result is always 79. For example, 58 and 60 becomes 85  6 = 79. [Green] "God may not play dice with the universe, but something strange is going on with the prime numbers."  Paul Erdős, 79 letter quote. [Homewood]
(There are 9 curios for this number that have not yet been approved by an editor.)
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