The following are some of the known transports to Majdanek concentration camp:

-- 150 Jewish men, used to build the camp, who had been captured in Lublin or Lipowa in October, 1941;
-- 2,000 to 5,000 Red Army POWs in December, 1941;
-- Unknown number of Jews from Biala Podlaska (including Jewish POWs) in 1941 or 1942;
-- Unknown number of Jews from Pulawy in 1941 or 1942;
-- ~1,000 Jewish men from Slovakia on March 29, 1942;
-- ~15,000 Jews from Slovakia, Bohemia, and Moravia in March and April, 1942;
-- 300 young Jewish women and 100 Jewish men from Uchanie ghetto in May 1942;
-- 700 Jews from Krasnystaw in May, 1942;
-- Unknown number of Jews from Poland in May, 1942;
-- 80 Jews from Deblin and Ryki in May, 1942;
-- Unknown number of Jews from Lida (Belarus) Ghetto in summer, 1942;
-- 400 Jews, including the Judenrat of Biala Podlaska and Jews from Suwalki, in August, 1942;
-- ~500 Jews from Lubartow (incl. Kamionka & Firlej) and Ostrow Lubelski ghettos on Oct. 11, 1942;
-- Unknown number of Jewish women from Radom on January 8, 1943
-- Unknown number of non-Jewish Polish prisoners from Pawiak prison on January 18, 1943;
-- Unknown number of Jewish women from Lwow and Warsaw in January and February, 1943;
-- 1,003 Jews from Drancy Concentration Camp (France) on March 4, 1943;
-- 998 Jews from Drancy Concentration Camp (France) on March 6, 1943;
-- Unknown number of non-Jewish women and children from Belarus in spring, 1943;
-- 500 Jewish men and women from Rejowiec ghetto (including from Slovakia/other countries) in spring, 1943;
-- 1,000 Jews from Miedzyrzec ghetto on April 30, 1943;
-- 1,000 Jews from Miedzyrzec ghetto on May 26, 1943;
-- Unknown number of former Red Army POWs in May, 1943;
-- 1,000 Jewish workers, most of them from Zamosc, in May, 1943;
-- More than 1,000 Jews from Kurow, Lubartow, Piaski ghetto, and Lublin region in May, 1943;
-- 36,500 Jews from rural Poland in 1943;
-- 6,000 Jews from the Netherlands and an unknown number of Jews from Greece in 1943;
-- 74,000 Jews from the Warsaw, Bialystok, and Lublin areas in July and August, 1943;
-- Unknown number of political prisoners from the prison at the Lublin Castle;
-- ~5,000 sick prisoners from Buchenwald, Dachau, and Sachenhausen concentration camps in fall and winter, 1943;
-- Unknown number of female prisoners from Auschwitz and Ravensbruck concentration camps in 1943;
-- Unknown number of Jewish children and residents from Kaunas, Lithuania on March 27, 1944.

Even with the unknown and incomplete figures above, more than 141,000 souls are counted among those transported to the camp.
That number is actually much higher, but enough records do not exist to substantiate specific transports to Lublin-Majdanek.

Between November 2nd and 30th in 1942, 21 prisoners attempted to escape from the Majdanek camp but were all shot. According
to the Majdanek museum in Poland, around 500 prisoners were able to escape from Majdanek, but it seems that most of them
were POWs and few were Jews. Several large groups of Jews escaped from Lipowa 7, a sub-camp of Majdanek.

The Aktion Erntefest, the largest execution at Majdanek (and the largest in all of Europe in a 24 hour period during the Holocaust)
took place on November 3, 1943, when the S.S. shot 18,400 Jews in ditches near the crematorium. When the Russians liberated
the camp in July of 1944, around 1,000 victims of Majdanek were still living. There are different estimates for the total number
of victims of the camp. A very low estimate I have seen is 78,000 murder victims. Considering the population of
Jews in Lublin alone was at least 40,000, this estimate would likely exclude deaths of all of the tens of thousands of people
sent to Lublin from various other locations in Europe. Given that 300,000 people were sent to Majdanek and very few escaped
death, a more accurate estimate is 230,000 to 260,000 victims -- including Jews, Poles, and gypsies.