It's that time of year again for the Tour de Primes 
Here is the PG webpage for this years TDP https://www.primegrid.com/forum_thread.php?id=10427#168083
Looks like GFN16 and PPSE are large enough for the T5K the book of the 5,000 largest primes. 
They are the best bet to get a P badge for the TDK
I would think it starts at 00:01 UTC Feb.1 
Results will be available at http://www.primegrid.com/challenge/tdp_2024.php.
 
From the PG thread:
For the month of February, an informal competition is offered. There are no challenge points to be gained... just a simple rare jersey at the end of the month to add to your badge list. No pressure or stress other than what you put on yourself. :)

For 2024, we're bringing back the badges introduced in 2018:


 

•  Red Jersey -- discoverer of largest prime
•  Yellow Jersey -- prime count leader (tiebreaker will be prime score)
•  Green Jersey -- points (prime score) leader
•  Polk-a-dot Jersey -- on the 29^th of February we'll have a "Mountain Stage" and award the Polk-a-dot Jersey to the one who finds the most primes on that day (tiebreaker will be prime score for that day). Yes, it's a leap year, so the Mountain Stage will be on the 29^th.
•  Prime badge -- awarded to everyone who finds an eligible prime during the month of February. This is a counter badge, so if you find more than one prime it will show how many you've found, up to 99.
•  Mega prime badge -- awarded to everyone who finds a mega prime during February. This is a counter badge.
•  Mountain Stage prime badge -- awarded to everyone who finds an eligible prime during the Mountain Stage. This is a counter badge.
•  Mountain Stage mega prime badge -- awarded to everyone who finds a mega prime during the Mountain Stage. This is a counter badge.

CPUs with AVX512 like X299. I9-7900x and so on
Then AVX2 then AVX. But AVX512 really does well.
That’s for LLR2 tasks like PPS and PPSE
GPU are best for the GFN primes like GFN16 through GFN22
But finding a GFN prime over 18 is rare
GFN16 and 17 are common
PPS and PPSE are your best bet with a CPU
PPS are mega primes. Primes with a million digits or more. So are GFN17 and larger

If I am not mistaken every sub-project is a mega prime except PPSE and GFN16.  I am pretty sure that's correct.
GFN18 are not common nor are they rare. They come along once in a while. Sometimes a few will hit, then a drought.
They are pretty large, nearly 2 million digits. 
Mountain stage day is about finding as many primes in that one day, so PPSE and GFN16 are the best bets. 

Congrats Opolis on your prime.
 
Congrats pew on your 2 primes.
 
https://www.primegrid.com/challenge/tdp_2024.php

I missed that NerdGZ found one yesterday also. Congrats!
Now it really is my turn. 

It’s your turn now Khali. I found one yesterday.

yodap
It’s your turn now Khali. I found one yesterday.

I will keep at it but my luck isn't great for primes. I will be happy to just find one so I get a badge this year.

Ooops. Wrong thread

Khalifrio
Looks like I got my one find of the event.
 
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Proth Prime Search (LLR2). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.
Since you have auto-reporting selected, the following prime was submitted on your behalf:
Added 137391 : 8895*2^1887372+1 (568160 digits)

 Persistence pays off! 

Well it looks like I was a bit too pessimistic on my chances of finding primes...
 

Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Proth Prime Search (LLR2). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.
Since you have auto-reporting selected, the following prime was submitted on your behalf:
Added 137543 : 9385*2^1905190+1 (573524 digits)
This prime was found on this workunit which will automatically show as a prime result after verification by the Largest Known Primes Database.
If you have any questions or concerns, please contact us and we will surely resolve any problems.
Once again, congratulations on your find! Thank you for participating in PrimeGrid.
PrimeGrid staff

I hope so. But I am looking for MEGA primes until the 29th, the mountain stage.
Running GFN17mega, GFN18, GFN19, PPS and SR5. It takes a lot of luck to get one of those. Fingers are crossed.
If it wasn't for bad luck I'd have no luck at all.  Great song, but I do get lucky once in a while! Come on lady luck.

Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Generalized Fermat Prime Search n=17 Mega (GFN-17-Mega). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.
Since you have auto-reporting selected, the following prime was submitted on your behalf:
Added 137604 : 211719438^131072+1 (1091275 digits)
This prime was found on this workunit which will automatically show as a prime result after verification by the Largest Known Primes Database.

Congrats Bill! 

Well what do you know? Found prime number three.
 
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Proth Prime Search (LLR2). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.
Since you have auto-reporting selected, the following prime was submitted on your behalf:
Added 137650 : 8467*2^1914296+1 (576265 digits)

One for the mountain stage, need a few more. C'mon Lady Luck smile on me again. Please.
 
Dear Primefinder,

Congratulations! Our records indicate that a computer registered by you has found a unique prime number. This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Generalized Fermat Prime Search n=16 (GFN-16). Since candidates on this subproject are not large enough to report to the Top 5000 Primes List, your prime is visible immediately.
Workunit 1082272690 : 360320800^65536+1 (560772 digits)