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28 November (2019)
Fabrice Laussy reposted
Quick reminder time! Next Thursday sees @fplaussy from @wlv_uni deliver his lecture "The most important experiment in #…
27 November (2019)
Congrats to Dr. Lòpez Carreño @juclopezca for passing his Thesis "Excitación con Luz Cuántica" with the greatest honours (Cum Laude) following the unanimous and secret vote from his prestigious Jury, composed of some of the most critical and knowledgeable scientists in his field.
26 November (2019)
22 November (2019)
21 November (2019)
Replying to @L4c0n1k and @YLeBolloch
«Les préfets sont votre préfet aussi» — même s'ils ne sont pas dans le même camp?
20 November (2019)
I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched C-beams glitter in the dark near the Tannhäuser Gate. All those moments will be lost in time, like tears in rain.
Replying to @d_schneidermann and @20hFrance2
Peut-être pas celui-ci, mais effectivement, un jour, l'un de ces martyrs deviendra celui de trop. Et après on ira pleurer les morts, la violence, la vraie, qui ira s'abattre sur ceux qui la distille au long cours. Jusqu'où fermer les yeux? laussy.org/wiki/Blog:Fabr…
Replying to @david__co and @lichess
by the way, many people have the same problem as me, as evidenced by the kinky profile of the distribution.
Replying to @david__co and @lichess
yes, I'm sure @ornicar could hack this.
Replying to @david__co and @lichess
not on a daily basis! max, min & final would be actually more informative and not much more data to store.
Replying to @david__co and @lichess
:) my problem is I don't know when to stop, let my rating collapse, and then have to build it up again till I get too tired and get collapsed it again. It's a pithy lichess doesn't record *all* games rating. I think I'll track my centipawns to identify when I enter loosing mode.
19 November (2019)
Replying to @razoor777 and @YLeBolloch
Y'en a d'autres c'est pas dans le dos et c'est pas figuratif.
16 November (2019)
Replying to @Etienne_Chouard
C'est une bonne comparaison, qui n'est flatteuse ni pour Thiers, ni pour Macron.
13 November (2019)
¿Teruel?
Julia recently hit this point of fascination that some people get with dinosaurs (something which even Jurassik park didn't bring me into and an indication I took to classify people as nerdier than me). Hopefully, this shall pass. But the drawings are cool.
12 November (2019)
Replying to @EricNaulleau
Comment peut-on faire une faute d'accent sur où?
11 November (2019)
If you follow what this thread is about, he/she means starting from the right, and that the chain of truncatable primes stops at the first number. Not that primes can't have 2 as leading digit (there are infinitely many).
10 November (2019)
But... removing the leading number does not give you the 2nd largest prime with the same property, which is 96686312646216567629137 (the 3rd one is 95918918997653319693967, etc.)
There are 4260 such primes, I give them here: laussy.org/wiki/Blog:Scie…
You can compute it. This Mathematica code
FixedPointList[Select[Flatten[Table[Range[9]*10^Length@IntegerDigits[#[[1]]] + #[[i]], {i,Length[#]}]], PrimeQ] &, {3}][[-3]] tells you that 36484957213536676883 is the largest such prime starting with 3. Indeed smaller than with 7.
FixedPointList[Select[Flatten[Table[Range[9]*10^Length@IntegerDigits[#[[1]]] + #[[i]], {i,Length[#]}]], PrimeQ] &, {3}][[-3]] tells you that 36484957213536676883 is the largest such prime starting with 3. Indeed smaller than with 7.
@sTeamTraen @lorenzhasanewip @evanpro @fermatslibrary If you allow 1 rightmost (not prime), you get 89726156799336363541, still smaller, and 9 (@Silberwolf52, also not prime) you get 78738315342618762345659, both still smaller than 357686312646216567629137.
1 & 9 are not primes, so if you remove all but the last digit, you're not always left with a prime.
Yes, same applies to 5. So it's only to check with 3.
As well you must check other primes starting with 2, 3, 5 as their rightmost number, which seems easy if they all terminate (if they wouldn't the given example wouldn't be the largest known).
Replying to @lorenzhasanewip and @fermatslibrary
seems easy to show that it's the provably largest.
7 November (2019)
Humans are mostly hairless... I know, I know...
3 November (2019)
«je t'aime, je t'aime, que j'aime ta voix qui me disait je t'aime» youtube.com/watch?v=NuLV_L…
Replying to @Poulin2012
«On m'a fermé un œil mais ils m'ont ouvert les yeux en fait». C'est ça, le panache.
Replying to @marcelsalathe
True, which makes those who predicted it beforehand, like Douglas Adams in this case (internet), even more admirable.