

Sequence of the Day

A005250: Increasing gaps between primes.

{ 1, 2, 4, 6, 8, 14, 18, 20, 22, 34, 36, 44, 52, ... } 
One of the great mysteries of the primes is their distribution, how some of them are so close together and some so far apart. Looking only at the increasing prime gaps does not lessen the mystery any.

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On this day...

 March 20, 1727 Sir Isaac Newton dies in London, going by the Julian calendar that was still in use at the time in England.
 March 20, 1840 Franz Mertens is born in Schroda, Posen (now Środa Wielkopolska).
Sequences in the News
 Feb 01 2018 Alphabet announced a $8,589,869,056 = $A000396(6) stock buyback.
 Jan 03 2018 Largest known term of A000043 announced: 77232917.
 Nov 18 2016 PrimeGrid proves that 10223 is not a Sierpinski number, since 10223 × 2 31172165 + 1 is prime. So no changes to A076336 for now.
 Sep 14 2016 Tom Greer discovers the twin primes 2996863034895 × 2 1290000 ± 1 using PrimeGrid, TwinGen and LLR.
 Jan 19 2016 Largest known term of A000043 announced: 274207281, also discovered by Curtis Cooper.
 Mar 02 2014 Fredrik Johansson announces a computation of the partition number p(10 20) ≈ 1.8381765 × 10 11140086259, the largest known term of A000041.
 Dec 06 2013 Microsoft launches a challenge to find large nonMersenne primes, A138837.

