21 digits prime number... that's a shit ton of options.. i mean, if for 12 digits we have 33,489,857,205 options, then for 21 digits should be a ton of numbers.

I can imagine 2 ways to solve this:

1.- We get all the prime number of 21 digits, and verify them as a brain wallet.

2.- read e while verify 21 digits chains and calculate of the number is a prime number.

By the way, i don't like at all the fact about someone already move BTC on the price addy.

It will be very difficult to solve the puzzle  because I was trying more than three days now with my own methods. but still I am not able to find solution, and still nobody can claim that because first 21 digits prime number found in consecutive digits of e, it is really very big numbers maybe somebody going to resolve this puzzle soon and I am still in the hunting process.

Yep, it's a difficult puzzle indeed, commensurate with the rewards.

For everyone, you can follow their official twitter account and see how those trying to solve the puzzle is doing.

https://twitter.com/Phemex_official/status/1217808220703473664

Actually the reward is 1.1BTC and the other 1BTC will go to your exchange's account but will they allow you to withdraw that amount too? The puzzle is complicated and it's one of the hardest.

Good luck to those folks that will solve this puzzle.

This is not an easy giveaway. No one would simply let you solve a very easy puzzle with a prize of 1.1 BTC.

The fact that this is a puzzle means this better be challenging or else this is not something the entire community would have fun solving.

you misread it. it is not prime numbers that have 21 digits, it is a prime number with 21 digits that is found inside digits of e and it is the first consecutive one.
it basically took me a minute to find the first 10k digits (http://mathshistory.st-andrews.ac.uk/HistTopics/e_10000.html) and another minute to write a small code and then about a nano second to find the answer. it is also posted by others: 957496696762772407663
it doesn't help though since there is nothing else to continue with!
as i said before, this still looks to me like an advertisement, i don't think it is even solvable. a brand new exchange is not just giving away $17850 and promise lots of $100 rewards!

So far, I have found that the puzzle rounds about the following...

- 957496696762772407663
- Phemex
- BTC/Bitcoin
- ETH/Ethereum
- XRP/Ripple
- Satoshi
- Nakamoto

I guess, following transformations have major role to play to find the HEX private key of 1h8BNZkhsPiu6EKazP19WkGxDw3jHf9aT...

- DEC to HEX
- ASCII to HEX
- SHA-256

They have released the 21 digits prime number with their latest tweet and it says that some hints can be found on their blog.

https://twitter.com/Phemex_official/status/1220426988126687236

https://twitter.com/Phemex_official/status/1220345172015214592

https://phemex.com/references/articles/a-letter-from-max

because one of their goals is certainly the promotion of exchange they have.
we should try first, if one of us wins follow this thread to provide evidence.

It's a puzzle for math people. Which I'm not. Not really even very fun to observe since I totally don't get what's going on. I know prime numbers. But probably never used one beyond 4 digits.

So I never participate in these kinds of puzzles. Maybe something more accessible would gain more traction. Otherwise you basically are giving away 1.1 BTC or $10k to just a small circle of guys who study math or engineering or whatever.

And miss out all the regular bitcoin users who actually go on exchanges to give you business.

Just my simple non puzzling 2 cents:)