Many sites say that the largest known prime is "2^57,885,161 − 1, a number with 17,425,170 digits." Given this and well known research about the density of primes, I think it's at least possible to estimate the number of primes between 1 and 2^57,885,161 − 1. But I don't know how to do this myself. I really want the answer to this one (the order of magnitude at least), but I've got lots of these, and I'd ideally like more cool ones. :) [more inside]
My question is twofold:
- What books, websites, or other resources do you recommend?
- Any tips for teaching a very young player?
Did Immanuel Kant ever say anything about chess? What about other board games? [more inside]
Is there any site which is as awesome for playing Go with a friend as lichess is for chess? "Awesome" means more specifically lightweight (dial-up friendly), browser-based, ad-free, no registration required.
I'm looking for some decent "vs" puzzle games that I and my 3 young boys (10 and under) can play against each other on my mac (a fun and silly chess game would be a plus, too). We have 2 macs in the house, so any online options would be welcome too! TIA.
Looking for a decent chess program that runs in a window rather than full-screen mode. [more inside]
Hi, does anyone know where to find a network chess game that is open source (free basically)? I'm a teacher and I want my class to play each other at chess during an ICT lesson.
ChessFilter: Help me with my chess dilemma [more inside]
How can I transform chess from a solitary to a social activity? [more inside]
My 6-year-old daughter has recently developed an interest in playing chess. We have a blast playing together, but I think it would be fun for her to play against the computer (or other novices) during her "screen time." What are some good computer chess games/websites that would develop the game of a young novice? Free is best, but I'd be happy to buy something (Win XP) if needed. Pretty graphics would be a bonus, but aren't necessary.
What are some good books for me to get better at playing chess? [more inside]
Linux and Chess: Looking for something with a painfully simple UI that still allows me to enter custom board positions. [check] [more inside]